A
AA
Auto Answer
AAA
Authentication, Authorization and Accounting
AAB
All-to-All Broadcast
AAC
Advanced Audio Coding
AACS
Advanced Access Control System
AAL
Asynchronous Transfer Mode Adaption Layer
AAM
Automatic Acoustic Management
AAP
Applications Access Point [DEC]
AARP
AppleTalk Address Resolution Protocol
AAS
All-to-All Scatter
AASP
ASCII Asynchronous Support Package
AAT
Average Access Time
AATP
Authorized Academic Training Program [Microsoft]
.ABA
Address Book Archive (file name extension) [Palm]
ABAP
Advanced Business Application Programming [SAP]
ABC
* Atanasoff-Berry Computer (First digital calculating machine that used vacuum tubes)
ABEND
Abnormal End
ABI
Application Binary Interface
ABIOS
Advanced BIOS
ABIST
Automatic Built-In Self-Test [IBM]
ABLE
Adaptive Battery Life Extender + Agent Building and Learning Environment [IBM]
ABM
Asynchronous Balanced Mode
ABR
Available Bit Rate
ABRD
Automatic Baud Rate Detection
ABRS
Automated Book Request System [British Library]
ABS
Address Book Synchronization [IBM] + Absolute
ABT
Abort
ABTS
ASCII Block Terminal Services
AC
Autocheck + Automatic Computer + Alternating Current
ACAP
Application Configuration Access Protocol
ACC
Accumulator
ACCMAIL
Accessing the Internet Via Email
ACD
Automatic Call Distribution
ACDI
Asynchronous Communications Device Interface
ACE
Access Control Encryption/Entry + Adobe Certified Expert + Advanced Composition Explorer [JHUAPL] + Advanced Computing Environment [SCO] + Adverse Channel Enhancements [Microcom] + *Automatic Computing Engine
ACF
Access Control Field + Advanced Communications Function
ACH
Automated Clearing House
ACIAS
Automated Calibration Interval Analysis System
ACIS
American Committee for Interoperable Systems
ACK
Acknowledgment
ACL
Access Control List + Asynchronous Connection-Less (link)
ACM
Association for Computing Machinery Audio Compression Manager [Microsoft]
ACMS
Application Control Management System
ACP
Ancillary Control Program + Auxiliary Control Process
ACPI
Advanced Configuration and Power Interface
ACR
Allowed Cell Rate
ACROSS
Automated Cargo Release and Operations
Service System
ACS
Access + Access Control Set + Access Control System + * Advanced Computer System [IBM] + Anti Curl System + Asynchronous Communication Server
ACSS
Audio Cascading Style Sheets
ACTLU
Active Logical Unit
ACTPU
Active Physical Unit
ACTS
Automated Computer Time Service
ACTT
Advanced Communication and Timekeeping Technology [Seiko]
ACU
Automatic Calling Unit
ACVC
Ada Compiler Validation Capacity
A/D
Analog to Digital
ADA
Automatic Data Acquisitions + (Programming Language named after Augusta Ada Lovelace)
ADB
Apple Desktop Bus
ADC
Adaptive Data Compression (protocol) [Hayes] + Add with Carry + Analog to Digital Converter
ADCCP
Advanced Data Communication Control Procedures/Protocol
ADD
Automatic Document Detection [WordPerfect]
ADF
Automatic Document Feeder + Automatically Defined Function
.ADF
Adapter Description File (file name extension)
ADI
AutoCad/AutoDesk Device Interface (driver)
ADIOS
Automated Download and Installation of Operating Systems [Queensland U.]
ADL
Address Data Latch
ADLAT
Adaptive Lattice Filter
ADLC
Adaptive Lossless Data Compression [IBM] + Asynchronous Data Link Control
ADMACS
Apple Document Management And Conrol System
ADMD
Administrative Management Domain [X.400]
.ADN
Add In Utility (file name extension) [Lotus 1-2-3] [LDC]
ADO
ActiveX Data Objects
ADP
AOLserver Dynamic Pages + Automatic Data Processing
ADPCM
Adaptive Differential Pulse Code Modulation
ADR
Address
ADS
Application Development Solutions [AT&T] + Application Development System + Automatic Distribution System
ADSC
Address Status Changed + Adobe Document Structuring Conventions
ADSI
Active Directory Service Interface [Microsoft] + Analog Display Services Interface
ADSL
Asymmetric DSL
ADSP
AppleTalk Datastream Protocol
ADSR
Attack, Decay, Sustain, Release
ADT
Abstract Data Type + Application Data Types
ADU
Automatic Dialing Unit
AE
Above or Equal
AEB
Analog Expansion Bus [Dialogic]
AEC
Architecture, Engineering, Construction
AEM
Asynchronous Event Mechanism
.AERO
Aviation Industry (Domain Name) [Internet]
AES
Advanced Encryption Standard
AESA
ATM End System Address
AF
Auxiliary carry Flag
AFA
Accelerated File Access
AFC
Antiferro-Magnetically Coupled (media) [IBM] + Automatic Font Change + Automatic Frequency Control
AFD
Automatic File Distribution
AFDW
Active Framework for Data Warehousing [Microsoft]
AFI
Authority and Format Identifier
AFII
Association for Font Information Interchange
AFIRM
Automated Fingerprint Image Reporting and Match
AFIS
Automated Fingerprint Identification System
.AFM
Adobe Font Metrics (file name extension) [Adobe Systems]
AFP
Advanced Function Presentation [IBM] + Advanced Function Printing + Appletalk Filing Protocol [Macintosh]
AFS
Andrew File System (protocols)
AFTP
Advanced/Anonymous File Transfer Protocol
AGA
Advanced Graphics Adapter
AGC
Automatic Gain Control
AGP
Accelerated/Advanced Graphics Port
AGRAS
Antiglare-Antireflective-Antistatic
AGU
Address-Generation Unit
AH
Authentication Header (protocol)
AHS
Automated Highway Systems
AI
Analog Input + Artificial Intelligence
AIA
Applications Integration Architecture [DEC]
AIC
AIXwindows Interface Composer [IBM]
AIFF
Audio Interchange File Format
AIIM
Association for Information and Image Management
AIM
AOL Instant Messenger
AIN
Advanced Intelligent Network [Bell Atlantic]
AIO
All-In-One
AIP
Application Infrastruture Provider
AIR
Architecture Implementation Review
AIS
Automated Identification System [NCIC] + Automated Information Systems
AISB
Association of Imaging Service Bureaus
AISP
Association of Information Systems Professionals
AIT
Advanced Intelligent Tape (drive) [Sony]
AIX
Advanced Interactive Executive [IBM]
AJAX
Asynchronous JavaScript and XML
ALAT
Advanced Load Address Table
ALC
Arithmetic and Logic Circuits + Automatic Level Control
ALE
Address Latch Enable + Application Linking and Embedding
ALGOL
Algorithmic Oriented Language (see IAL)
ALIBI
Adaptive Location of Internetworked Bases of Information
ALICE
Artificial Linguistic Internet Computer Entity
ALINK
Active Link [HTML]
ALIWEB
Archie Like Indexing in the Web [Internet]
ALM
Asset Liability Management
ALN
Asynchronous Learning Network
ALOS
Alternate Lighting Of Surfaces
ALP
Automatic Language Processing
ALR
Advanced Logic Research, Inc.
ALT
Alternate (mode)
ALT.
Alternate lifestyle [USENET Newsgroup Category]
ALU
Arithmetic Logic Unit
AM
Amplitude Modulation
AMA
Automatic Message Accounting
AMANDDA
Automated Messaging and Directory Assistance
AMASS
Archival Management and Storage System
AMD
Active Matrix Display + Advanced Micro Devices, Inc.
AMDD
Agile Modelling Driven Development
AMI
Alternate Mark Inversion + American Megatrends, Inc. + Application Messaging Interface
AMMA
Advanced Memory Management Architecture [Everex Systems]
AMPL
Algebraic/Applied Mathematical Programming Language
AMPS
Advanced Mobile Phone Service + Amplifiers
AMR
Audio Modem Riser
ANCOVA
Analysis of Covariance
ANDF
Architecture-Neutral Distribution Format
ANI
Automatic Number Identification
.ANI
Animated Cursor (file name extension) [Microsoft]
ANN
Artificial Neural Network
.ANN
Annotations (file name extension) [IBM]
ANOVA
Analysis Of Variance
ANSI
American National Standards Institute
ANX
Automotive Network Exchange [Chrysler/Ford/General Motors]
AO
Analog Output
AOCE
Apple Open Collaboration Environment
AO/DI
Always On/Dynamic ISDN
AODV
Ad Hoc On-Demand Distance Vector
AOE
Application Operating Environment [AT&T]
AOL
America Online
AOS
Add Or Subtract
AP
Adjunct Processor + Application Processor
A/P
Accounts Payable
APA
Adaptive Packet Assembly + All Points Addressable + Arithmetic Processing Accelerator
APAR
Authorized Program Analysis Report [IBM]
APAREN
Address Parity Enable [IBM]
APCUG
Association of PC User Groups
APDU
Application Protocol Data Units
API
Application Program Interface
APIC
Advanced Programmable Interrupt Controller (bus) [Intel]
APIPA
Automatic Private Interenet Protocol Addressing
APIS
Advanced Passenger Information System
APL
* A Programming Language (Mathematics)
APM
Advanced Power Management [IBM]
APNIC
Asia-Pacific Network Information Center [Internet]
APOP
Authenticated Post Office Protocol
.APP
Application (file name extension) [R:Base]
APPC
Advanced Program-to-Program Communications [IBM]
APPI
Advanced Peer-to-Peer Internetworking
APPLETS
Applications
APPN
Advanced Peer-to-Peer Networking [IBM]
APPS
Applications
APR
Annual Percentage Rate
APRP
Adaptive Pattern Recognition Processing
APS
Active Pixel Sensor + Advanced Photo System + Advanced Printing Service [IBM] + Asynchronous Protocol Specification
APSE
ADA Programming Support Environment
APT
Address Pass Through + Advanced Parallel Technology + Automatically Programmed Tools
A/R
Accounts Receivable
ARA
AppleTalk Remote Access
ARAG
Antireflective-Antiglare
ARAS
Antireflective-Antistatic
ARC
Acoustic Resonance Control
.ARC
Archive (file name extension)
ARCA
Advanced RISC Computing Architecture
ARCnet
Attached Resource Computer Network
.ARJ
Compressed File (file name extension) [Jung]
ARL
Adjusted Ring Length
ARLL
Advanced Run Length Limited
ARM
Advanced RISC Machine (processor) + Annotated Reference Manual + Asynchronous Response Mode
ARMA
Association of Records Managers and Administrators
ARP
Address Resolution Protocol [Novell]
ARPANET
Advanced Research Projects Agency Network
ARPL
Adjust Requested Privilege Level
ARS
Activity Reporting System [Unisys]
ART
Adaptive Resonance Theory (algorithm)
ARTA
Apple Real Time Architecture
ARTIC
A Real-Time Interface Coprocessor [IBM]
ARTS
Asynchronous Remote Takeover Server
.ARTS
Cultural Groups (Domain Name) [Internet]
ARTT
Asynchronous Remote Takeover Terminal
ARQ
Automatic Repeat Request
ARU
Audio Response Unit + Average Retail Value
AS
Autonomous System [Internet]
ASAI
Adjunct Switch Application Interface [AT&T]
ASAP
As Soon As Possible + Automatic Switching And Processing
AS3AP
ANSI SQL Standard Scalable and Portable
ASB
Advanced System Buffering [Intel]
.ASC
ASCII text (file name extension)
ASCC
* Automatic Sequence Controlled Calculator [IBM]
ASCII
American Standard Code for Information Interchange
ASD
Application Structure Database [Microsoft] + Automatic Skip Driver [Microsoft]
ASF
Active Streaming Format [Microsoft] + Advanced Systems Format [Microsoft]
ASIC
Application-Specific Integrated Circuit
ASIT
Advanced Security and Identification Technology
ASL
Adaptive Speed Levelling
ASLM
Apple Shared Library Manager [Macintosh]
.ASM
Assembler Source Language (file name extension)
ASMP
Asymmetric Multprocessing
ASN
Abstract Syntax Notation + Autonomous System Number
ASO
Automated Systems Operations
ASP
Active Server Page [Microsoft] + Application/Authorized Service Provider + Aspect Oriented Programming + Association of Shareware Professionals
.ASP
Active Server Page (file name extension)
ASPI
Advanced SCSI Programming Interface [Adaptec]
ASPS
Advanced Signal Processing System
ASR
Address Space Register + Automatic Send-Receive + Automatic Speech Recognition + Automatic System Recovery
ASSP
Anti-Spam SMTP Proxy + Application-Specific Standard Product
AST
AST Research, Inc. (named from first initials of the founders: Albert Wong, Safi Qureshey, Thomas Yuen)
AS/U
Advanced Server for Unix
ASYNC
Asynchronous
AS/400
Application System/400 [IBM]
AT
Advanced Technology + Attention
ATA
Advanced Technology Attachment + Analog Terminal Adapter
ATAPI
Advanced Technology Attachment Packet Interface
ATC
Advanced Transfer Cache
ATDP
Attention Dial Pulse
ATDT
Attention Dial Tone
ATE
Automated Test Equipment
ATG
Advanced Technology Group + All-Terrain Grade [Dell]
ATH
Attention Hang-Up (Modem command)
ATL
Active Template Library
ATM
Adobe Typeface Manager + Air Traffic Management + Asynchronous Transfer Mode + Automated Teller Machine
ATPS
AppleTalk Printing Services [Macintosh]
ATR
Automatic Terminal Recognition
ATS
Administrative Terminal System + Apple Terminal Services
AT&T
American Telephone and Telegraph
ATTN
Attention
ATTRIB
Attribute (also ATR)
ATX
Advanced Technology Extended [Intel]
ATZ
Attention Restore configuration profile from nonvolatile RAM (Modem command)
.AU
Audio (file name extension)
AUDIT
Automated Data Input Terminal
AUI
Attachment/Autonomous Unit Interface
AUP
Acceptable Use Policy [Internet]
AUTO
Automatic
AUTOEXEC
Automatic Execution
AUX
Auxiliary + (First Serial Port)
AV
Audio/Video + Audio/Visual + Authenticity Verification
AVA
Audio Visual Authoring [IBM]
AVC
Audio Visual Connection [IBM]
AVD
Alternating Voice and Data
AVG
Average
AVI
Audio Video Interleave [Microsoft]
AVL
AVL Tree (named after its founders: Adelson, Veiskii and Landis
AVP
Attribute-Value Pair
AVR
Automatic Voice Recognition
AVS
Advanced Visual Systems
AVT
Applied Voice Technology
AVVID
Architecture for Voice Video & Integrated Data [Cisco]
AWE
Advanced Wave Effects [Creative Lab]
AWG
American Wire Gage
AWK
(Unix language named after its authors... Al Aho, Peter Weinberger and Brian Kernighan)
AWS
Advanced Workstations and Systems (group) [IBM]
AWT
Abstract Window Toolkit [Java]
AX
Architecture Extended + Automatic Transmission
B
BA
Bell Atlantic (company)
BACP
Bandwidth Allocation Control Protocol
BAK
Binary Adaptation Kit [Microsoft]
.BAK
Backup (file name extension)
BAL
Basic Assembly Language
BALUN
Balanced Unbalanced (device)
BAM
Boyan Action Module
BAPI
Business Application Programming Interface [SAP]
BARTS
Bell Atlantic Regional Timesharing
.BAS
Basic Language (file name extension)
BASH
Bourne Again Shell [Unix]
BASIC
Beginner's All-purpose Symbolic Instruction Code
BASM
Built-In Assembler
BAT
Block Address Translation
.BAT
Batch Processing (file name extension)
B2B
Business-To-Business
BBS
Bulletin Board System
B2C
Business To Consumer
BCC
Block Check Character
BCC:
Blind Carbon Copy
BCD
Binary Coded Decimal + B-CHANNEL Bearer Channel
BCL
Base Class Libraries + Batch Command Language
BCN
Beacon
BCNF
Boyce-Codd Normal Form
BCP
Best Current Practice + Bulk Copy Program
BCPL
Basic Computer Programming Language
BCR
Byte Count Register
BCS
Bar Code Sorter
BDA
Bios Data Area
BDC
Backup Domain Controller
BDE
Borland Database Engine [Borland]
BDLS
Bidirectional Loop Switching
BDOS
Basic Disk Operating System
BDR
Bus Device Request
BDSL
Broadband DSL
BE
Below or Equal
B2E
Business To Employees
BECN
Backward Explicit Congestion Notification
BEDO
Burst Extended Data Out
BEEP
Blocks Extensible Exchange Protocol
BEL
Bell
BELLCORE
Bell Communications Research
BER
Basic Encoding Rules + Bit Error Rate
BERT
Bit Error Rate Test/Tester
BF
Bad Flag
B/F
Background/Foreground
.BFC
Briefcase (file name extension) [Microsoft]
BFF
Binary File Format [IBM]
BFT
Binary File Transfer
BFTP
Batch FTP
BGA
Ball Grid Array
BGCOLOR
Background Color [HTML]
BGE
Branch if Greater or Equal
.BGI
Borland Graphic Interface (file name extension)
BGP
Border Gateway Protocol
BGT
Branch if Greater Than
BHI
Branch if Higher
BHIS
Branch if Higher or Same
BHO
Browser Helper Object [Spybot]
BI
Binary Input
.BIB
Bibliography (file name extension)
BiDi
Bi-Directional
BIFET
Bipolar Field Effect Transistor
BIFF
Binary Interchange File Format
BIM
Beginning of Information Marker
.BIN
Binary (file name extension)
BINAC
* Binary Automatic Computer
BIND
Berkeley Internet Name Domain
BINHEX
Binary Hexadecimal
BIOS
Basic Input/Output System
BIS
Business Information System
BISDN
Broadband Integrated Services Digital Network
BIST
Built-In Self-Test
BiSYNC
(See BSYNC)
BIT
Binary Digit
BITNET
Because It's Time Network
BITNIC
Bitnet Network Information Center
BIU
Bus Interface Unit
BIW
Business Intelligence Warehouse [SAP]
BIX
Byte Information Exchange (BBS)
.BIZ
Businesses (Domain Name) [Internet]
.BK!
Backup (file name extension) [WordPerfect]
.B~K
Backup (file name extension)
BKSP
Backspace
BL
Backlit + Bit Line
BLAS
Basic Linear Algebra Subroutines
BLAST
Bell Labs Layered Space Time + Blocked Asynchronous Transmission (protocol) [Communications Research Group]
.BLD
BASIC Bload Graphics (file name extension)
BLE
Branch if Less or Equal
BLER
Block Error
BLI
Business Logic Integration [Microsoft]
BLK
Block
BLMC
Buried Logic Macrocell
BLOB
Binary Large Object
BLOG
Web Log
BLOS
Branch if Lower Or Same
BMI
Branch if Minus
BMIC
BusMaster Interface Controller [Intel]
BMP
Basic Mapping Support + Basic Multilingual Plane + Batch Message Processing Program
.BMP
Bitmap (file name extension) [Paintbrush Format]
BNC
Bayonet Neill-Concelman (connector used with coaxial cable invented by Mr. Neill-Concelman) + British Naval Connector
BNE
Branch if Not Equal
BNF
Backus-Naur Form (also Backus-Normal Form) [developed by John Backus and Peter Naur]
BNS
Backbone Network Service
BO
Binary Output
BOA
Basic Object Adapter
BOB
Break-out Box
BOC
Basic Operator Console
BOF
Beginning Of File
BOM
Basic Online Memory [IBM] + Beginning Of Message
BOND
Bandwidth On Demand
BOOTP
Bootstrap Protocol [Internet]
BOPS
Billion Operations Per Second
BORPQU
Borland Pro Quattro
BORQU
Borland Quattro
BOS
Basic Operating System
BOT
Beginning Of Table + Beginning of Tape + Robot
BP
Base Pointer
BPB
BIOS Parameter Block
BPDU
Bridge Protocol Data Unit + Berkeley Packet Filter
BPI
Bits Per Inch
BPL
Branch If Plus + Broadband Over Power Lines
BPM
Business Process Management [Microsoft]
BPP
Bits Per Pixel
BPR
Business Process Re-engineering [Linux]
BPS
Bits Per Second + Bytes Per Second
BPSK
Binary Phase Shift Keying
BR
Bad Register
BRGC
Binary Reflected Gray Code
BRI
Basic Rate Interface + Brain Response Interface
BS
Backspace
BSAM
Basic Sequential Access Method
BSC
Base Station Controller + Binary Synchronous Communication
.BSC
Boyan Script (file name extension) [Boyan Communications]
BSCS
Bachelor of Science (Degree) in Computer Science
BSD
Berkely Software/Standard Distribution
BSF
Bit Scan Forward
BSI
British Standards Institute
BSM
Basic Storage Module [IBM]
BSP
Bulk Synchronous Parallelism
BSR
Bit Scan Reverse
BS-RAM
Burst Static RAM
BSS
Block Started by Symbol
BST
Binary Search Tree
BSY
Busy
BSYNC
Binary Synchronous Communications (protocol)
BT
Bit Test
BTAM
Basic Telecommunications Access Method [IBM]
BTB
Branch Target Buffer
BTC
Bit Test and Complement
BTI
Business Type Identifier
BTOA
Binary To ASCII
BTP
Batch Transfer Program
BTR
Bit Test and Reset
BTS
Base Transceiver Station + Bit Test and Set
BU
Branch Unit
BUBL
Bulletin Board for Libraries [Janet]
BUF
Buffer
BUS
Broadcast and Unknown Server
BVH
Base Video Handler
BWM
Block-Write Mode
B2X
Binary To Hexadecimal [REXX]
BYTE
Binary Element String
C
C
C Programming Language
.C
C source code (file name extension) [C]
CA
Certification Authority + Collision Avoidance
CAB
Compressed Application Binary [Microsoft]
.CAB
Cabinet (file name extension) [Microsoft]
CACLS
Command-Line Access Control Lists [Microsoft]
CAD
Computer Aided Design
CADD
Computer Aided Design and Drafting
CADE
Client/server Application Development Environment
CAE
Client Application Enabler + Common Applications Environment + Computer Aided Engineering
CAEN
Chemically Assembled Electronic Nanocomputer
CAEX
Computer Aided Exploration
CAG
Column Address Generator
CAI
Computer Aided Instruction
CAIRN
Collaborative Advanced Interagency Research Network
CAL
Calendar + Client Access License + Computer Aided Learning
CALS
Computer-Aided Acquisition in Logistic Support
CAM
Common Access Method + Computer Aided Manufacturing + Contents Addressable Memory
CAN
Cancel + Controller Area Network
CANBUS
Conroller Area Network Bus
CAP
Carrierless Amplitude and Phase-Modulation + Central Arbitration Point + Communication Application Platform + Competitive Access Provider + Computer Aided Publishing
.CAP
Capture (file name extension)
CAPD
Computing To Assist Persons With Disabilities [Johns Hopkins University]
CAPE
Concurrent Art-to-Product Environment
CAPS
Capitals (Upper Case Letters) + Cassette Programming System
CAPTCHA
Completely Automatic Public Turing Test To Tell Computers and Humans Apart
CAR
Committed Access Rate [Cisco]
CARL
Colorado Alliance of Research Libraries [Internet]
CART
Computer-Assisted Radar Tomography
CAS
Column Address Select/Strobe + Communications Application Specification + Computer Aided Styling
CASE
Computer Aided Software Engineering
CASL
Crosstalk Application Scripting Language [DCA]
CASS
Computer Assisted Search Service
CASSIS
Classified and Search Support Information System
CAT
Computer Adaptive Test + Computer Aided Testing + Computer Aided Tomography + Computer Aided Transcription + Concatenate
.CAT
Catalog (file name extension)
CATS
Computer Assisted Training System
CAT5E
(Cat 5e) Category 5e (cables)
CAT SCAN
Computerized Axial Tomography Scan
CATV
Community Antenna Television (this was the original name for what is now known as Cable TV)
CAU
Controlled Access Unit
CAV
Constant Angular Velocity
CAVE
Computer Automatic Virtual Environment
CBC
Cipher Block Chaining
CBCR
Channel Byte Count Register
CBDS
Connectionless Broadband Data Service
CBEMA
Computer and Business Equipment Manufacturers Association
CBGA
Ceramic Ball Grid Array
CBI
Computer Based Instruction\Instrumentation
CBL
Computer Based Learning
.CBL
COBOL source code (file name extension)
CBMS
Computer-Based Mail System
CBN
Community Based Networks
CBR
Case Based Reasoning + Constant Bit Rate
CBT
Computer Based Training
CBW
Convert Byte to Word
CBX
Computer-Controlled Branch Exchange
CC
Cluster Controller
CC:
Carbon Copy
CCD
Charged-Coupled Device
CCFT
Cold Cathode Fluorescent Tube
CCI
Common Client Interface + Copy Control Information
CCIE
Cisco Certified Internetwork Expert [Cisco]
CCITT
Comite Consultatif International Telegraphique et Telephonique/ Consultative Committee for International Telegraph and Telephone
CCL
Connection/Cursor Control Language
CCM
Corba Component Mode + Crystal Configuration Manager [Microsoft]
CCNA
Cisco Certified Network Associate
CCNP
Cisco Certified Network Professional
CCP
Certified Computing Professional + Console Command Processor
CC/PP
Composite Capabilities/Preference Profile
CCS
Common Command Set + Common Communications Services + Common Communications Support + Continuous Composite Servo + Cryptographic Checksum
.CCS
Color Calibration System (file name extension)
CCSIS
Coded Character Set ID
CCSD
Cellular Circuit-Switched Data
CCTLD
Country Code Top-Level Domain
CD
Carrier Detect + Change Directory + Collision Detection + Color Display + Compact Disk
C/D
Control Data
C2D
Character To Decimal [REXX]
CDA
Compound Document Architecture [DEC]
.CDA
CD Audio-Track (file name extension)
CDBT
Compact Disk-Based Training
CDC
Connected Device Configuration + Control Data Corporation
CD_CHRDY
Card Channel Ready [IBM]
CD-DA
Compact Disk - Digital Audio
CDDI
Copper Distributed Data Interface
CDE
Common Desktop Environment + Complex Data Entry
CD-E
Compact Disk - Erasable
CDF
Channel Definition Format
.CDF
Comma Delimited Format (file name extension)
CDFS
Compact Disc File System [Microsoft]
CD+G
Compact Disk plus Graphics
CD-I
Compact Disk - Interactive
CDIA
Certified Document Imaging Architect
CDL
Computer Design Language
CDMA
Code Division Multiple Access
CDMF
Commercial Data Masking Facility [IBM]
CD-MO
Compact Disk - Magneto Optical
CDN
Content Distribution Network + Content Delivery Network
CDO
Collaboration Data Objects [Microsoft]
CDOS
Concurrent Disk Operating System
CDP
* Certificate In Data Processing (First certification for Computer Professionals)
CDPD
Cellular Digital Packet Data
CDR
Call Detail Record + Call Detail Recording + Common Data Representation
.CDR
CorelDRAW (file name extension) [Corel]
CD-R
Compact Disk - Recordable
CD-RAM
Cached RAM
CD-RDX
Compact Disk - Read Only Memory Data Exchange Standard
CDRL
Contract Data Requirements List
CD-ROM
Compact Disk - Read Only Memory
CD-ROM-XA
CD-ROM Extended Architecture
CD-RTOS
Compact Disk - Real Time Operating System
CD-RW
Compact Disk - Rewritable
CDS
Current Directory Structure
CDSA
Common Data Security Architecture
CDSL
Consumer DSL [Rockwell]
.CDT
Corel Draw Template (file name extension)
CD-V
Compact Disk - Video
CD-WO
Compact Disk - Write Once
.CDX
Compound Index (file name extension) [Fox Pro]
CD-XA
Compact Disk - Extended Architecture
CE
Cache Enable + Chip Enable + Collision Elimination + Consumer Elecronics + Convert Enable
CEB
Conditional End Bracket
CEC
Certified E-Commerce Consultant
CEG
Continuous Edge Graphics
CEI
Conducted Electromagnetic Interference
CELP
Card Edge Low Profile (socket) [Intel]
CEMS
Constituent Electronic Mail System
CEOP
Conditional End Of Page
CER
Canonical Encoding Rules
CERN
The European Particle Physics Laboratory (initials originally from Conseil Europeen pour la Recherche Nucleaire)
CERT
Computer Emergency Response Team
CFB
Cipher Feedback + Configurable Function Block
CF
Compact Flash (camera)
.CFG
Configuration (file name extension)
CFM
Code Fragment Manager [Macintosh] + Cubic Feet Per Minute
CFML
ColdFusion Markup Language
CFP
Call For Proposal
CFR
Computerized Facial Recognition
CFS
Caching/Common File System
CFV
Call For Votes [Bitnet]
CG
Control Gate
CGA
Color Graphics Adapter
CGE
Common Graphics Environment
CGI
Computer Generated Images + Computer Graphics Interface
CGI-BIN
Common Gateway Interface - Binary
.CGM
Computer Graphics Metafile (file name extension) + Graph (file name extension) [Lotus 1-2-3] [LDC]
CGMS
Copy Generation Management System
CGS
Continuous-Grain Silicon
CHAP
Challenge-Handshake Authentication Protocol
CHAR
Character
CHAT
Conversational Hypertext Access Technology [Internet]
CHCK
Channel Check
CHCP
Change Code Page
CHDIR
Change Directory
CHFN
Change Finger [Unix]
CHGRP
Change Group
CHIPS
Clearinghouse Interbank Payments System
.CHK
CHKDSK (file name extension)
CHKDSK
Check Disk
CHMOD
Change Mode
CHOWN
Change Owner
CHP
Chapter
CHR
Character
CHRP
Common Hardware Reference Platform
CHS
Cylinder Head Sector
CHTML
Compact/Compressed HTML
CI
Component Interface
CIA
Current Instruction Address
CIAC
Computer Incident Advisory Capability
CICS/VS
Customer Information Control System/Virtual Storage [IBM]
CID
Charge-Injection Device + Configuration/Installation/Distribution
CIDR
Classless Inter-Domain Routing
CIF
Common Interchange/Intermediate Format + Crystallographic Information File + Customer Information Feed
CIFS
Common Internet File System
CIL
Common Intermediate Language [ECMA]
CIM
Common Information Model + CompuServe Information Manager + Computer Integrated Manufacturing
CIO
Chief Information Officer
CIOCS
Communication Input/Output Control System
CIP
Command Interface Port + Common Indexing Protocol
CIR
Committed Information Rate
CIRC
Circular Reference + Cross-Interleaved Reed-Solomon Code
CIS
Card Information Structure + Client Information System + CompuServe Information Service + Computer Information Systems + Contact Image Sensor + Customer Information System
CISC
Complex Instruction Set Computing
CIT
Computer-Integrated Telephony
CIVR
Computer and Interactive Voice Response
CIW
Certified Internet Webmaster
CIX
Commercial Internet Exchange + Compulink Information Exchange
CJLI
Command Job Language Interpreter
CKD
Count Key Data (device)
CLAR
Channel Local Address Register
CLASS
Client Access to Systems and Services + Cooperative Library Agency for Systems and Services + Custom Local-Area Signaling Services
CLC
Clear Carry Flag
CLD
Clear Direction Flag
CLDC
Connected Limited Device Configuration
CLEC
Competitive Local Exchange Carrier
CLI
Call-Level Interface + Clear Interrupt Flag + Client Library Interface + Command Line Interface + Common Language Infrastructure/Interface
CLIB
C Library
CLID
Calling Line Identification
CLIST
Command List
CLK
Clock
CLNP
Connectionless Network Protocol
CLOS
Common Lisp Object System
CLP
Cell Loss Priority + Constraint Logic Programming
.CLP
Clipboard (file name extension) [Microsoft]
CLR
Common Language Runtime [Microsoft]
CLS
Clear Screen + Common Language Support
CLSID
Class Identifier
CLTP
Connectionless Transport Protocol
CLTS
Clear Task Switch Flag
CLTV
Constant Linear Time Velocity
CLUI
Command Line User Interface
CLUT
Color Look-Up Table
CLV
Constant Linear Velocity
CM
Centimeter + Control Mark + Corrective Maintenance
CMA
Concert Multi-thread Architecture
CMAK
Connection Manager Administration Kit [Microsoft]
CMC
Common Mail Calls + Common Messaging Calls + Communication Management Configuration + Complement Carry Flag + Computer-Mediated Communication [Internet]
CMD
Circuit Mode Data
.CMD
Command (file name extension)
CMF
Creative Music Format
CNIDR
Clearinghouse for Network Information and Discovery and Retrieval [Internet]
CMIP
Common Management Information Protocol
CMIS
Common Management Information Services/System
CML
Chemical Markup Language + Conceptual Modelling Language + Computer Managed Learning + Current Mode Logic
CMM
Capability Maturity Model
CMMS
Computerized Maintenance Management Software
CMMU
Cache/Memory Management Unit [Motorola]
CMOS
Coats-Mellon Operational Specification + Complementary Metal-Oxide Semiconductor
CMOV
Conditional Move
CMP
Compare + Computer
CMPS
Compare Word String
CMS
Call Management Server + Code Management System + Compiler Monitor System + Content Management System + Conversation Monitor System
CMTS
Cable Modem Termination System
CMVC
Configuration Management Version Control [IBM]
CMW
Compartmented Mode Workstation
CMY
Cyan-Magenta-Yellow (color model)
CMYK
Cyan-Magenta-Yellow-Black (color model)
CNA
Certified NetWare/Network Administrator
CNAPS
Co-Processing Node Architecture for Parallel Systems
CNC
Computerized Numerical Control
CNE
Certified NetWare Engineer
.CNF
Configuration (file name extension)
CNG
Calling (tone)
CNI
Certified Novell Instructor [Novell]
CNIDR
Clearinghouse for Networked Information and Discovery and Retrieval [Internet]
CNN
Composite Network Node
CNR
Carrier to Noise Ratio + Communication Network Riser
CNSS
Core Nodal Switching Subsystem [Internet]
CNT
Carbon Nanotube
.CNT
Contents (file name extension)
CNV
Conventional (pertaining to Memory)
CNVT
Convert
CNX
Certified Network Expert
CO
Central Office + Command Output + Convert Out
COAST
Card On A Stick (module)
COAX
Coaxial Cable
COB
Chip-On-Board
.COB
COBOL source code (file name extension)
COBOL
Common Business-oriented Language (See HLL)
.COD
Code List (file name extension)
CODASYL
* Conference on Data System Languages (Group that designed COBOL)
CODE
Client-Server Open Development Environment
CODEC
Coder/Decoder + Compression/Decompression
COE
Common Operating Environment
COEM
Commercial Original Equipment Manufacturer
COFF
Common Object File Format [Unix]
COGO
Coordinate Geometry (Programming Language)
COL
Collision + Computer Oriented Language
COLD
Computer Output to Laser Disk
COLL
Collision
COM
Component Object Model [Microsoft] + Computer Output Microfilm
.COM
Command (file name extension) + Commercial Business (Domain Name) [Internet]
COM1
First serial Port (asynchronous port)
COM2
Second serial Port
COM3
Third serial Port
COM4
Fourth serial Port
COMDEX
Computer Dealers Exposition
COMET
Cornell Macintosh Terminal Emulator
COMM
Communications
COMMAT
In Morse Code (.--.-.)(dot dash dash dot dash dot), name of the sign to denote the Commercial At symbol "@". (Adopted by the ITU in December 2003)
COMP
Compare
COMP.
Computers [USENET Newsgroup Category]
COMSAT
Communications Satellite Corporation
CON
Console (includes Keyboard and Screen)
COND
Condition
CONFIG
Configuration
CONS
Connection-Oriented Network Service
CONTONE
Continuous Tone
.COOP
Cooperatives-Business (Domain Name) [Internet]
COPICS
Communications Oriented Production Information and Control System [IBM]
COR
Common Object Runtime
CORBA
Common Object Request Broker Architecture
COREN
Corporation for Research and Enterprise Network
COS
Compatible Operating System + Customer Order Specification [Kodak/Fuji]
COSE
Combined Office Standard Environment + Common Open Software/Systems Environment
COSMIC
Computer Software Management and Information Center [NASA]
COSMOS
Computer System for Mainframe Operations
COSS
Common Object Services Specification
COTS
Commercial Off-The-Shelf (software)
CP
Copy Protected
CPA
Certified Public Accountant + Cost Per Action
CPAN
Comprehensive Perl Archive Network
CPC
Constant Point Calculation + Cost Per Click
CPCS
Check Processing Control System [IBM]
CPE
Central Processing Element + Customer Premises Equipment + Customer Provided Equipment
.CPE
Cover Page (file name extension)
CPFR
Collaborative Planning, Forecasting and Replenishment
CPG
Clock Pulse Generator
CPI
Characters Per Inch + Clock Per Instruction + Common Programming Interface [IBM]
.CPI
Code Page Information (file name extension) [MS-DOS]
CPI-C
Common Programming Interface for Communications [IBM]
CPIO
Copy In and Out [Unix]
CPL
Current Privilege Level
.CPL
Control Panel (file name extension)
CPLD
Complex Programmable Logic Device
CPM
Critical Path Method + Cryptography Provider Manager
CP/M
Control Program for Microcomputers [Digital Research]
CPO
Chief Privacy Officer
CPRM
Content Protection for Recordable Media
CPS
Certification Practice Statement + Characters Per Second + Cycles Per Second
CPT
Command Pass Through
CPU
Central Processing Unit
CPW
Commercial Processing Workload [IBM]
CR
Carriage Return
CRAM
Challenge-Response Authentication Mechanism + Cyberspatial Reality Advancement Movement
CRAYON
Create Your Own Newspaper
CRC
Cyclic Redundancy Check
.CRD
Cardfile (file name extension) +
Chord
(music file name extension)
CREN
Computer Research Education Network + Corporation for Research and Education Networking
CRF
Cable Retransmission Facility + Cross Reference File
CRI
Color Reproduction Indices
CRISM
Compact Reconnaissance Imaging Spectrometer for Mars
CRISP
C Reduced Instruction Set Processor [AT&T Bell Labs]
CRL
Certificate Revocation List
CR/LF
Carriage Return/Line Feed
CRM
Customer Relationship Management
CROM
Control Read Only Memory
CRT
Cathode Ray Tube
CRTC
CRT Controller
CRUD
Create, Retrieve, Update, Delete
CS
Chip Select + Clear to Send + Code Segment
C/S
Client/Server
CSA
Calendaring and Scheduling API [IBM]
CSAR
Channel System Address Register
CSCW
Computer Supported Cooperative Work
CSD
Circuit-Switched Data + Computer Services Department + Corrective Service Diskette [IBM]
CSDS
Circuit Switched Data Service
CSE
Certified System Engineer
CSFI
Communication Subsystem For Interconnection
CSG
Constructive Solid Geometry + Consulting Services Group [Lotus]
CSI
Code Sequence Identification + Command Sequence Introducer + CompuServe Incorporated
CSID
Called Subscriber Identification
CSL
Computer Sensitive Language
CSLIP
Compressed Serial Line Interface Protocol [Internet]
CSM
Code Set Map (file) + Communications Services Manager + Control Strip Module [Macintosh]
CSMA/CA
Carrier Sense Multiple Access/with Collision Avoidance
CSMA/CD
Carrier Sense Multiple Access/with Collision Detection
CSMS
Customer Support Management System
CSN
Card-Select Number
CSNET
Computer Science Network
CSO
Central Services Organization
CSP
Certified Systems Professional + Chip-Scale Packaging + Commercial Service Provider + Commercial Subroutine Package + CompuCom Speed Protocol [CompuCom] + Communicating Sequential Processes + Cross System Product [IBM]
CSPDN
Circuit Switched Public Data Network
CSRAM
Custom Static RAM
CSS
* Continuous System Simulator (Language)
CSS
Cascading Style Sheet [Microsoft] + Contact Start-Stop + Content Scrambling System
CSSM
Client-Server Systems Management [IBM]
CS/SS
Card Service/Socket Service
CSTA
Computer-Supported Telephony Applications
CSU
Channel Service/Switching Unit
CSV
Circuit-Switched Voice + Comma-Separated Value/Variable + Common Services Verbs (interface) [Microsoft]
C2T
Cable Changing Technology
C&T
Chips and Technologies
CTB
Cipher Type Byte
CTC
Channel To Channel + Counter/Timer Chip
CTCP
Client-To-Client Protocol
CTI
Computer-Telephony Integration
CTL
Complex Text Layout
CTOS
Cassette Tape Operating System + Computerized Tomography Operating System + Convergent Technologies Operating System
CTP
Community Technology Preview [Microsoft]
CTPA
Coax-to-Twisted-Pair Adapter
CTRCO
* Calculating,Tabulating,Recording Company (The name of this company was changed to "International Business Machines" by Thomas J. Watson, Sr.)
CTRL
Control
CTS
Clear To Send + Computer Telephony Solution [IBM] + Customer Telephone System
CTSS
* Compatible Time Sharing System
CUA
Common User Access [IBM]
CUB
Cursor Backward
CUD
Cursor Down
CUE
Custom Updates and Extras (card) [Egghead Software]
CUF
Cursor Forward
CUI
Character-Oriented User Interface + Common User Interface [IBM]
CUP
Cursor Position
CUPID
Completely Universal Processor I/O Design [AST]
.CUR
Cursor (file name extension)
CUSIP
Committee for Uniform Security Identification Procedures [U.S. Treasury]
CUT
Control Unit Terminal
CUTE
Clarkston University Terminal Emulator
CUU
Cursor Up
CVE
Common Vulnerabilities and Exposures [US-CERT]
CVF
Compressed Volume File
CVGA
Color Video Graphics Array
CVIA
Computer Virus Industry Association
.CVR
Cover Page (file name extension)
CVS
Computer Vision Syndrome + Concurrent Versions System
CVT
Convert
CVW
CodeView for Windows
CWA
Competitive Web Analysis
CWD
Convert Word to Double Word + Change Working Directory [Internet]
CWIS
Campus Wide Information Service/System [Internet] + Community Wide Information Service/System [Internet]
C2X
Character To Hexadecimal [REXX]
CXML
Commerce Extensible Markup Language
CYL
Cylinder
CYMK
Cyan-Yellow-Magenta-Black (color model)
D
D/A
Digital to Analog
DAA
Data Access Arrangement + Decimal Adjust for Addition
DAB
Digital Audio Broadcasting
DAC
Data Acquisition and Control + Device Access Code + Digital to Analog Converter + Dual Attachment Concentrator
DACL
Discretionary Access Control List
DACTLU
Deactive Logical Unit
DAD
Desktop Application Director [Borland]
DAE
Digital Audio Extraction
DAF
Destination Address Field
DAI
Distributed Artificial Intelligence
DAL
Data Access Language [Apple Computer] + Data Access Layer + Disk Access Lockout
DAM
Data Acquisition and Monitoring
DAMA
Demand Assigned Multiple Access
DAMPS
Digital AMPS
DAO
Data Access Object [Microsoft] + Disk At Once
DAP
Data/Directory Access Protocol + Developer Assistance Program + Dynamic Application Partitioning [IBM]
DAPIE
Developers Application Programming Interface Extensions
DARI
Database Application Remote Interface [IBM]
DARMS
Digital Alternate Realization of Musical Symbols
DART
Digital Audio Reconstruction Technology
DAS
Decimal Adjust for Subtraction + Dual-Attached Station
DASD
Direct Access Storage Device [IBM]
DAT
Digital Audio Tape + Disk Array Technology
.DAT
Data (file name extension)
DATACOM
Data Communications
DAV
Digital Audio-Video + Distributed Authoring and Versioning
DAVIC
Digital Audio-Visual Council
dB
Decibel
DB
Data Base + Data Buffer + Device Bay
dBA
Adjusted Decibel
.dba
Date Book Archive (file name extension) [Palm]
DBBS
Dynamic Bass Boot System
DBC
Device Bay Controller
DBCS
Delivery Bar Code Sorter + Double-Byte Character Set
.DBF
Database Format (file name extension)
DBIS
Dun & Bradstreet Information Services
.DBK
Docbook (format) (file name extension)
dBm
Decibels to a Milliwatt
DBM
Data Base Manager
DBMS
Data Base Management System
DBR
DOS Boot Record
DBS
Data Base Server + Direct (to home) Broadcast (satellite) System
DBV
Digital Broadcast Video
DBWR
Database Writer [Oracle]
DB2
Database 2
DC
Data Collection + Data Communication + Data Control + Device Control + Direct Current
D2C
Decimal To Character [REXX]
DCA
Digital Communications Associates + Document Content Architecture [IBM]
DCAF
Distributed Console Access Facility [IBM]
DCAM
Digital Camera + Direct Chip Attach Module
DCB
Device Control Block + Disk Coprocessor Board [Novell]
DCC
Data Country Code + Digital Command Control + Digital Compact Cassette + Direct Cable/Client Connection + Display Combination Code
DCD
Data Carrier Detect
DCE
Data Circuit-Terminating Equipment + Data Communications Equipment + Distributed Computing Environment [OSF] + Distributed Computing Equipment
DCED
Distributed Computing Environment Daemon
DCF
Data Communication Facility [IBM] + Data Compression Facility + Data Count Field [IBM] + Design Rule for Camera File Systems + Driver Configuration File [Lotus] D-CHANNEL Data Channel
DCI
Digital Camera Images + Display Control Interface
DCIM
Duscrete Complex Image Method
DCL
Data Control Language + Declaration + DEC Command Language [DEC] + Device Clear + Digital Control Logic + Digital Command Language [Digital]
DCML
Dynamic Configuration Markup Language
DCOM
Distributed Component Object Model
DCP
Device Control Protocol + Digital Light Processing [TI]
DCS
Data Collection System + Data Control System + Desktop Color Separation + Distributed Control System
DCT
Discrete Cosine Transform
.DCT
Dictionary (file name extension)
DCU
Data-Cache Unit
DD
Day + Digital Display + Double Density
DDA
Distributed Data Access + Domain-Defined Attribute
DDB
Device Dependent Bitmap + Device Descriptor Block
DDC
Digital Data Channel [VESA] + Display Data Channel
DDCMP
Digital Data Communications Message Protocol [DEC]
DDC1
Display Data Channel One
DDCS
Distributed Database Connection Services [IBM]
DDD
Direct Distance Dialing
DDE
Direct Data Entry + Dynamic Data Exchange [Microsoft]
DDEML
Dynamic Data Exchange Manager Library [Microsoft]
DDF
Display Data Channel + Dynamic Data Formatting [IBM]
DDI
Device Driver Interface + Digital Document Interchange + Direct Dial In
DDK
Device Driver Kit [Microsoft Windows]
DDL
Data Definition Language + Data Description Language
DDM
Distributed Data Management
DDN
Defense Data Network
DDNS
Dynamic Domain Naming System
DDOS
Distributed Denial Of Service
DDP
Datagram Delivery Protocol + Distributed Data Processing
DDR
Dynamic Document Review [Symantec]
DDR-SDRAM
Double Data Rate-SDRAM
DDS
Data Description Specification + Digital Dataphone Service [AT&T] + Design Data Sheet + Digital Data Storage + Direct Digital Synthesis + Distributed Database Services
DDX
Digital Data Exchange
DE
Device End
DEA
Data Encryption Algorithm + Disposable Email Address
DEC
Decrement + Device Clear + Digital Equipment Corporation
DECNET
Digital Equipment Corporation Networking (protocol)
DEF
Desktop Functional Equivalent [Compaq]
.DEF
Definitions + Defaults (file name extensions)
DEFRAG
Defragment
DEK
Data Encryption Key
DEL
Delete
DELSTR
Delete String [REXX]
.DEM
Demonstration (file name extension)
DEN
Directory Enabled Network + Document Enabled Networking [Novell-Xerox]
DEP
Data Execution Protection [Microsoft]
DER
Distinguished Encoding Rules
DES
Data Encryption Standard + Data Entry Sheet
.DES
Description (file name extension)
DET
Device Execute Trigger
DEV
Device
DF
Data Field + Default + Destination Field + Device Flag + Double Flag
DFC
Data Flow Control
DFD
Data Flow Diagram
DFDR
Digital Flight Data Recorder
DFM
Design For Manufacturability [IBM]
DFP
Digital Flat Panel
DFS
Distributed File System
DFSMS
Data Facility Storage Management Subsystem [IBM]
DFT
Design For Testability + Diagnostic Function Test + Discrete Fourier Transform + Distributed Function Terminal
DFU
Data File Utility
DGIS
Direct Graphics Interface Standard
DHCP
Dynamic Host Configuration Protocol
DHL
Dynamic Head Loading
.DHP
Dr. Halo PIC (file name extension)
DHTML
Dynamic HTML
DI
Data In + Destination Index
DIA
Document Interchange Architecture [IBM]
DIAD
Delivery Information Acquisition Device [UPS]
DIB
Device Independent Bitmap + Directory Information Base + Dual Independent Bus [Intel]
DIBOL
DEC Business Oriented Language
.DIC
Dictionary (file name extension)
DICOM
Digital Imaging and Communications in Medicine
DID
Direct Inward Dialing
DIDS
Distributed Intrusion Detection System
DIF
Data Interchange Format
DIFFSENS
Differential Sense
DIIP
Direct Interrupt Identification Port
DILA
Direct-Drive Image Light Amplifier
DIME
Direct Internet Message Encapsulation
DIMM
Dual In-Line Memory Module
DIN
Deutsche Industrie Norm (German equivalent of EIA)
DIO
Data Input-Output
DIP
Dialup Internet Protocol [Internet] + Digital Imaging Processing + Dual In-line Package + Dual In-line Pin
DIR
Directory (file)
DIS
Distributed Interactive Simulation + Draft International Standard + Dynamic Impedance Stabilization [CompuCom]
DISA
Data Interchange Standards Association + Direct Inward System Access
DISP
Displacement (offset)
DIST
Digital Image Scaling Technology
DIT
Directory Information Tree
DIV
Divide
DIVE
Direct Interface Video Extension [OS/2 Warp]
DIVX
Digital Video Express
DIW
D-Inside Wire [AT&T]
DIX
Digital-Intel-Xerox (Original Ethernet Standard)
.DIZ
Description In Zip (file name extension)
DL
Download (also D/L)
DL/1
Data Manipulation Language 1 [IBM]
DLB
Dynamic Load Balancing
DLC
Data Link Control (protocol) [IBM] + Distributed Loop Carrier
DLCI
Data Link Connection Identifier
DLD
Display List Driver
DLE
Data Link Escape
DLL
Dynamic Link Library
DLM
Distributed Lock Manager + Dynamic Link Module
DLP
Digital Light Processing
DLPI
Data Link Provider Interface
DLR
DOS LAN Requester
DLS
Data Link Switching [IBM] + Downloadable Sounds
DLT
Digital Linear Tape
DM
Distributed Memory
DMA
Direct Memory Access/Addressing + Document Management Alliance
DMAC
DMA Controller
DMACS
Distributed Manufacturing Automation & Control Software
DMD
Digital Micromirror Device [TI]
DME
Direct Memory Execution + Distributed Management Environment
DMF
Distribution Media Format [Microsoft]
DMI
Desktop Management Interface
DML
Data Manipulation Language + Dialog Markup Language [W3C]
DMM
Digital Multimeter
DMMS
Dynamic Memory Management System
DMOS
Double-diffused Metal-Oxide Semiconductor
DMP
Dot Matrix Printer
DMPC
Distributed Memory Parallel Computer
DMPP
Distributed Memory Parallel Processor
DMQS
Display Mode Query and Set [IBM]
DMS
Data Management Software + Data/Document Management System
DMSD
Digital Multistandard Decoding
DMSDK
Digital Media Software Development Kit [SGI]
DMSS
Distributed Mass Storage System
DMT
Digital/Discrete Multi-Tone
DMTF
Desktop Management Task Force
DMY
Day Month Year
DMZ
Demilitarized Zone
DN
Down
DNA
Deoxyribonucleic Acid
DNC
Direct Numerical Control
DNIC
Data Network Identification Code
DNIE
Digital Natural Image Engine
DNIS
Dialed Number Identification Service
DNS
Domain Naming System
DO
Data Out + Distributed Objects
DOA
Dead On Arrival
.DOC
Document + Documentation (file name extensions)
DOCSIS
Data Over Cable-Service Interface Specification
DOCSV
Data Over Circuit-Switched Voice
DOE
Distributed Objects Environment/Everywhere
DOIP
Dial Other Internet Providers [IBM]
DO-IT
Disabilities, Opportunities, Internetworking, and Technology
DOLAP
Desktop OLAP
DOM
Document Object Model [W3C]
DOMF
Distributed Object Management Facility
DOS
Denial Of Service + Disk Operating System
DOSEM
DOS Emulation
.DOT
Document Template (file name extension)
DOV
Data Over Voice
DOW
Day Of Week
DP
Data Processing + Dot Pitch
DPA
Demand Protocol Architecture [3Com] + Document Printing Architecture
DPAM
Demand Priority Access Method
DPAREN
Data Parity Enable [IBM]
DPB
Drive Parameter Block
DPC
Direct Program Control
DPI
Distributed Protocol Interface + Dots Per Inch
DPL
Dedicated Public License + Descriptor Privilege Level
DPM
Digital Panel Meter
DPMA
Data Processing Management Association
DPMI
DOS Protected Mode Interface [Microsoft]
DPMS
Digital Power Management Signaling + Display Power Management Support
DPO
Data Phase Optimization
DPOF
Digital Print Order Format
DPS
Document Processing System
DPSK
Differential Phase Shift Keying
DPtoTP
Display Coordinates to Tablet Coordinates (converting)
DQDB
Distributed Queue Dual Bus
DQL
Data Query Language
DR
Data Received
D/R
Direct or Reverse
DRAM
Dynamic Random Access Memory
DRAW
Direct Read After Write
DR.BOND
Dial-up Router Bandwidth On Demand [NEC]
DRCMF
Digital Reality Creation Multi Function [Sony]
DRDA
Distributed Relational Database Algorithm/Architecture [IBM]
DR-DOS
Digital Research-Disk Operating System
DRDW
Direct Read During Write
DRE
Direct Recording Electronic (voting systems)
DRI
Declarative Referential Integrity + Digital Research Incorporated
DRM
Digital Rights/Distributed Resource Management
DRO
Data Request Output + Destructive Read-Out
DRS
Document Registration System
.DRS
Driver Resource (file name extension) [WordPerfect]
DRV
Drive
.DRV
Device Driver (file name extension) (Also see .DVR)
.DRW
Draw + Drawing (file name extensions)
DS
Data Segment + Data Send + Data Server + Double Sided
D/S
Dhrystone Per Second
DS3
Digital Signal Level 3
DSA
Digital Signature Algorithm + Directory System Agent
DSAP
Destination Service Access Point
DSD
Direct Stream Digital [Sony-Philips]
DSDD
Double Sided, Double Density (diskette)
DSE
Data Storage Equipment
DSEA
Display Station Emulation Adapter
DSECT
Dummy Control Section
DSHD
Double Sided, High Density (diskette)
DSIG
Digital Signature
DSIS
Distributed Support Information Standard
DSL
Digital Subscriber Line + Domain Specific Language + Dynamic Simulation Language
DSLAM
Digital Subscriber Line Access Multiplexer
D-SLR
Digital Single Lens Reflex (camera)
DSM
Distributed Shared Memory + Domain-Specific Modeling
DSMA
Digital Sense Multiple Access
DSML
Directory Services Markup Language
DSN
Data Source Name + Delivery Service Notification
DSO
Dynamic Shared Object
DSOM
Distributed System Object Model
DSP
Delivery Service Partner + Digital Signal Processing/Processor + Digital Sound Processor + Directory Synchronization Protocol [Lotus]
DSPT
Display Station Pass-Thru [IBM]
DSQD
Double Sided, Quad Density (diskette)
DSR
Data Set Ready + Device Status Register + Device Status Report
DSS
Decision Support System + Digital Signature Standard + Digital Spread Spectrum + Direct Station Selector
DSSA
Domain Specific Software Architecture
DSSI
Digital Standard Systems Interconnect [DEC]
DSSS
Direct-Sequencing Spread Spectrum
DSSSL
Document Style Semantics and Specifications Language
DSTN
Double Supertwisted Nematic
DSU
Data Service/Switching Unit + Digital Service Unit
DSVD
Digital Simultaneous Voice and Data
DSW
Data Status Word + Device Status Word
DSX
Digital Signals Cross-Connect
D2T2
Dye Diffusion Thermal Transfer (printing)
DTA
Digital Terminal Adapter + Disk Transfer Area
.DTA
Data (file name extension)
DTC
Desktop Conferencing
DTCP
Digital Transmission Copy Protection [Hitachi, Intel, Panasonic, Sony, Toshiba]
DTD
Document Type Definition
DTE
Data Terminal Equipment + Dumb Terminal Emulator
DTF
Distributed Test Facility
DTL
Dialogue Tag Language [IBM] + Diode-Transistor Logic
DTM
Digital Terrain Mapping
DTMF
Data Tone Multiple Frequency + Dual Tone Multifrequency
DTP
Desktop Publishing + Distributed Transaction Process
DTR
Data Terminal Ready + Data Transfer Rate
DTS
Digital Theatre Systems + Digital Transceiving System Distributed Traffic Shaping [Cisco]
DTSS
Dartmouth Time Sharing System
DTV
Desktop Video + Digital Television
DTVC
Desktop Video Conferencing
DU
Disk Usage
DUA
Directory User Agent
DUAT
Direct User Access Terminal
DUN
Dial-Up Networking [Microsoft]
DUNCE
Dial Up Network Connection Enhancement
DV
Digital Video
.DV
DESQview Script (file name extension)
DVC
Desktop Video Conferencing + Digital Video Camera + Digital Video Cassette + Dual Voice Coil
DVD
Digital Video Disk
DVD-A
Digital Video Disk-Audio
DVD-AR
Digital Video Disk-Audio Recording
DVD-R
Digital Video Disk-Recordable
DVD-RAM
Digital Versatile Disc-RAM
DVD-ROM
Digital Versatile Disc-ROM
DVD-SR
Digital Video Disk-Stream Recording
DVD-VR
Digital Video Disk-Video Recording
DVE
Digital Video Effect
DVI
Digital Video Interactive + Digital Visual Interface
.DVI
Device Independent (file name extension)
DVM
Digital Video Manager + Digital Volt Meter
DVMRP
Distance Vector Multicast Routing Protocol [Internet]
DVOF
Digital Video Over Fiber
DVR
Digital Video/Voice Recorder
.DVR
Device Driver (file name extension) (Also see .DRV)
DW
Data Warehousing
DWDM
Dense Wavelength Division Multiplexer
DWG
Drawing
DWMT
Discrete Wavelet Multitone
DWT
Discrete Wavelet Transform
D2X
Decimal To Hexadecimal [REXX]
.DXB
Drawing Interchange Binary (file name extension) [AutoCAD]
DXC
Data Exchange Control
DXF
Data Exchange File + Drawing Exchange Format
DXI
Data Exchange Interface
DYNSLT
Dynamic Select [IBM]
DYNSRC
Dynamic Source
E
EA
Effective Address + Extended Attribute [OS/2]
EAI
Enterprise Application Integration
EAP
Extensible Authentification Protocol
EAR
Enterprise Archive + External Access Register
EARN
European Academic Research Network
EAROM
Electrically Alterable Read Only Memory
EARS
Electronic Access to Reference Services + Electronic Authoring and Routing System [DEC] + Explicit Archive and Retrieval System [Langley Research]
EATA
Enhanced AT Bus Attachment
EAX
Environmental Audio Extensions [Creative]
EB
Exabyte (1,024 petabytes) (One Billion Billion characters of information)
EBASIC
Extended BASIC
EBC
EISA Bus Controller
EBCT
Electron Beam Computed Tomography
EBCDIC
Extended Binary Coded Decimal Interchange Code [IBM]
EBI
Equivalent Background Input + Extended Background Investigation
EBNF
Extended Backus-Naur Form
EBOOK
Electronic Book
EBPP
Electric Bill Presentment and Payment
EBR
Extended Boot Record
EBS
Event-Based Sampling
EBT
Electronic Benefits Transfer
EBXM
Electronic Business XML
EC
Electronic Commerce + Error Control
ECAL
Enjoy Computing And Learn
ECAT
Electronic Card Assembly and Test [IBM]
ECB
Electronic Codebook + Event Control Block
ECC
Elliptic Curve Crypto + Error Check Code + Error Checking and Correction + Error Correction Code
ECD
Enhanced Color Display + Enhanced Compact Disk
ECDL
European Computer Driving Licence
ECHO
European Commission Host Organization [Internet]
ECI
External Call Interface
ECL
Emitter Coupled Logic
ECM
Electronic Control Module
ECMA
European Computer Manufacturers Association
ECN
Electronic Communications Network
ECNE
Enterprise Certified NetWare Engineer [Novell]
ECP
Enhanced/Extended Capabilities Port [Microsoft]
ECS
Enhanced Chip Set
ECTL
Electronic Communal Temporal Lobe
ECU
EISA Configuration Utility
ED
Erase Display
EDA
Electronic Design Automation + Embedded Document Architecture [Go Corporation]
EDB
Embedded Database
EDC
Electronic Digital Computer + Enhanced Data Correction + Error Detection and Correction
EDDC
Extended Distance Data Cable
EDE
Encrypt-Decrypt-Encrypt
EDG
Electronic Program Guide
EDGAR
Electronic Data Gathering, Analysis and Retrieval
EDGE
Enhanced Data-Rates for Global Evolution
EDI
Electronic Data Interchange + Electronic Document Interchange [DEC]
EDIF
Electronic Design Interchange Format
EDIFACT
EDI for Administration Commerce and Transport
EDL
Edit Decision List
EDLC
Ethernet Data Link Control
EDLIN
Editor (Line Text)
EDMS
Electronic Document Management System
EDO
Extended Data Out
EDOS
Enhanced DOS for Windows
EDP
Electronic Data Processing
EDPM
Electronic Data Processing Machine
EDR
Enhanced Data Rate
EDRAM
Enhanced/Eraseable/Extended Dynamic Random Access Memory
EDS
Electronic Data Systems (corporation)
EDSAC
* Electronic Delay Storage Automatic Calculator
EDTV
Enhanced Definition Television
.EDU
Educational Institutions (Domain Name) [Internet]
EDVAC
* Electronic Discrete Variable Automatic Computer (First stored-program digital computer)
EE
Extended Edition [IBM]
EEC
Extended Error Correction
EEDID
Enhanced-Extended Display Identification Data
EEG
Electroencephalogram
EEL
Epsilon Extension Language
EEM
Extended Memory Management
EEMAC
Electrical & Electronic Manufacturers of Canada
EEMS
Enhanced Expanded Memory Specification
EEPI
Electronic Entertainment Policy Initiative
EEPROM
Electrically Erasable Programmable Read-Only Memory
EES
Escrow Encryption Standard
EFA
Extended File Attribute
EFF
Electronic Frontier Foundation
EFI
Electromechanical Frequency Interference + Electronics For Imaging + Extensible Firmware Interface
EFIGS
English, French, Italian, German, Spanish
EFL
Emitter Follower Logic
E-FORM
Electronic Form
EFS
Encrypting File System
EFTS
Electronic Funds Transfer System
EGA
Enhanced Graphics Adapter
EGP
Exterior Gateway Protocol
EGREP
Extended Global Regular Expression Print [Unix]
EHCI
Enhanced Host Controller Interface
EHLLAPI
Emulator High Level Language Application Programming Interface [IBM]
EIA
Electronic Industries Association
EICAS
Engine Indicating and Crew Alerting System
EIDE
Enhanced Integrated Drive Electronics
EIM
Electronic Image Management
EIS
Enterprise/Executive Information System
EISA
Extended Industry Standard Architecture
EJB
Enterprise JavaBeans
EL
Electroluminescent (display) + Erase Line
ELAN
Emulated Local Area Network
ELC
Embedded Linking and Control
ELD
Electronic License Distribution
ELEC
Enterprise Local Exchange Carrier
ELF
Executable and Linking Format + Extremely Low Frequency
ELOS
Embedded-Objects Linked Across Systems
ELPH
Entr Level PowerShot [Canon]
ELS
Entry Level System
EM
Electronic Mail + Emphasized + End of Medium + Expanded Memory
EMA
Electronic Mail Association + Enterprise Management/Memory Architecture
EMACS
Editing Macros [Unix]
E-MAIL
Electronic Mail
EMB
Extended Memory Block [LIM/AST]
EMBARC
Electronic Mail Broadcast to a Roaming Computer [Motorola]
EMC
Electromagnetic Compatibility + Enhanced Memory Chip + E-Mail Connection + Extended Math Coprocessor
EMCC
* Eckert-Mauchly Computer Company (World's first computer company, founded by Presper Eckart and John Mauchly, who invented and built the first UNIVAC)
EMF
Extended Metafile Format [Microsoft]
EMI
Electromagnetic Interference
.EML
Electronic Mail (file name extension)
EMM
Expanded Memory Manager
EMP
Electro-Magnetic Pulse
EMR
Electro-Magnetic Radiation + Enhanced Metafile Record
EMS
Electronic Mail System + Electronic Message Service + Energy Management System + Enhanced Messaging Service + Expanded Memory Specification [LIM]
EMSAPI
Extended Messaging Services Application Programming Interface
EMWAC
European Microsoft Windows NT Academic Centre
.ENC
Encoded (file name extension)
ENDEC
Encoder/Decoder
ENDS
Ends Segment
ENIAC
* Electronic Numerical Integrator Analyzer and Computer (First fully electronic digital computer)
ENQ
Enquiry
ENSS
Exterior Nodal Switching Subsystem [Internet]
EOA
End Of Address
EOB
End Of Block
EOC
End Of Conversion
EOF
End Of File + Enterprise Objects Framework [Next Computer]
EOI
End Of Interrupt + End Or Identify
EOJ
End Of Job
EOL
End Of Line + End Of List
EOM
End Of Message
EOR
Exclusive OR (Also XOR)
EOS
Earth Observing System [NASA] + Electro-Optical System [Canon] + End Of String + Error Correction Code on SIMM
EOSDIS
Earth Observing System Data and Information System [NASA]
EOT
Embedded Open Type (format) [Microsoft] + End Of Table + End Of Tape (marker) + End Of Text + End Of Transmission
EP
Electrophotographic Engine
EPC
Electronic Product Code
EPIC
Explicitly Parallel Instruction Computing (chip) [Intel]
EPG
Electronic Program Guide
EPL
Effective Privilege Level
EPLD
Electrically Programmable Logic Device
EPM
Enhanced Editor for Presentation Manager [IBM] + Enterprise Process Management [IBM]
EPP
Enhanced Parallel Port
EPROCESS
Executive Process
EPROM
Electrically Programmable Read Only Memory + Erasable Programmable Read Only Memory
.EPS
Encapsulated PostScript (file name extension)
EPSF
Encapsulated PostScript Files
ERA
Extended Registry Attributes
ERAS
Electronic Routing and Approval System [Hughes Aircraft]
ERD
Emergency Repair Disk + Entity Relationship Diagram
ERIC
Educational Resources Information Center [Internet]
ERLL
Enhanced Run Length Limited
ERMA
* Electronic Recording Method, Accounting [General Electric]
EROM
Erasable Read Only Memory
EROS
Earth Resources Observation System [U.S. Geological Survey]
ERP
Effective Radiated Power + Enterprise Resource Planning
ERR
Error
ER/RC
Extended Result/Response Code
ERU
Emergency Recovery Utility [Microsoft]
ES
Extra Segment
ESA
Enterprise Systems Architecture [IBM] + European Space Agency
ESB
Enterprise Service Bus
ESC
EISA System Component + Escape
ESCD
Extended System Configuration Data
ESCM
Extended Services Communications Manager [IBM]
ESCO
Extemded Synchronous Connections
ESCON
Enterprise System Connection (Architecture) [IBM]
ESC/P
Epson Standard Code for Printers
ESD
Electronic Software Distribution + Electrostatic Discharge + Emergency Startup Disk
ESDI
Enhanced Small/System Device Interface
ESDRAM
Enhanced SDRAM
ESF
Extended Superframe
ESI
End System Identifier + Enhanced Serial Interface (specification) [Hayes]
ESMR
Enhanced Specialized Mobile Radio
ESMTP
Extended Simple Mail Transfer Protocol
ESN
Electronic Security/Serial Number
ESP
Emulation Sensing Processor + Encapsulating Security Payload (header) + Enhanced Serial Port [Hayes] + Enhanced Service Provider + Enterprise System Platcorm + Estimated Selling Price + Eudora Sharing Protocol [Qualcomm]
ESR
Event Service Routine
ESS
Electronic Switching System
ESSENCE
Electronic Surveillance System for the Early Notification of Community-Based Epidemics [Johns Hopkins University]
ESSID
Extended Service Set Identifier
ESU
Electro-Static Unit
ET
Enhancement Technology
ETACS
Extended Total Access Communication System [IBM]
ETANN
Electrically Trainable Analog Neural Network (chip) [Intel]
ETB
End of Transmission Block
ETC
Electronic Toll Collection + Enhanced Throughput Cellular (modem protocol) [AT&T]
E-TEXT
Electronic Text
ETF
Enriched Text Format
ETOM
Electron-Trapping Optical Memory
ETPL
Endorsed Tempest Products List
ETS
Econometric Time Series
ETX
End Of Text
EU
Execution Unit
.EU
European Union (Domain Name) [Internet]
EUC
End-User Computing + Extended Unix Code [IBM]
EUDC
End-User Defined Character
EUDORA
(Named after author of story: "Why I Live at the P.O.", Ms. Eudora Welty)
EUI
End-User Interface
EULA
End-User License Agreement
EUVL
Extreme Ultraviolet Lithography
EVDO
Evolution Data Only/Optimized
EVE
Extensible VAX Editor
EVGA
Extended Video Graphics Array + Extended Video Graphics Adapter
EWAN
Emulator Without A Good Name [Internet]
EWS
Employee Written Software [IBM]
EWTS
Enterprise Web Training System
EXCA
Exchangeable Card Architecture [Intel]
.EXE
Executable (file name extension)
EXE2BIN
Program used to convert an (.EXE) file to binary format (.COM) file
EXIF
Exchangeable Image File Format
EXM
Enterprise Messaging Exchange [Lotus]
EXP
Exponent
EXT
External
EXTRN
External Reference
E-ZINE
Electronic Magazine
F
FAB
Computer-Chip Fabrication Plant
FAC
File Access Code
FAMOS
Floating Gate Avalanche MOS
FANS
Future Air Navigation System
FAP
File Access Protocol
FAPI
Family Application Program Interface
FAQ
Frequently Asked Question
FARNET
Federation of American Research Networks [Internet]
FASIC
Function and Algorithm-Specific Integrated Circuit
FAT
File Allocation Table
FAX
Facsimile
.FAX
Fax (file name extension)
FBC
Find By Content
FC/AL
Fiber Channel/Arbitrated Loop
FCB
File Control Block
FCC
Federal Communications Commission
FCC:
File Carbon Copy
FCCSET
Federal Coordinating Council for Science, Engineering and Technology
FC/EL
Fiber Channel/Enhanced Loop
FCI
Flux Changes per Inch
FCL
Fibre Channel Loop
FCPGA
Flip Chip Pin Grid Array [Intel]
FCR
FIFO Control Register
FCRAM
Fast-Cycle RAM
FCS
Fiber Channel Standard + Frame Check Sequence
FD
Floppy Disk + Floppy Drive + Full Duplex
FDC
Floppy Disk Controller
FDDI
Fiber Digital Device Interface + Fiber Distributed Data Interface
FDHD
Floppy Drive High Density
FDIR
Fault Detection, Isolation and Recovery
FDISK
Fixed Disk
FDM
Frequency Division Multiplexing
FDMA
Frequency Division Multiple Access
FDSL
Fixed Directory Subscriber List
FDX
Full Duplex
FEC
Forward Error Correction
FECN
Forward Explicit Congestion Notification
FED
Field Emission/Emitter Display
FEFO
First-Ended, First-Out
FEP
Front End Processor
FEPI
Front End Programming Interface
FEPROM
Flash EPROM
FERAM
Ferroelectric RAM
FESDK
Far East Software Development Kit [Microsoft]
FET
Field Effect Transistor
FF
Flip-Flop + Form Feed
FFD
Full Funtion Device
FFDC
First Failure Data Capture [IBM]
FFS
Fast File System
FFST
First Failure Support Technology [IBM]
FFT
Fast Fourier Transform + Final Form Text [IBM]
FG
Floating Gate
FGREP
Fixed Global Regular Expression Print [Unix]
FHS
Fan Heat-Sink
FHSS
Frequency-Hopping Spread Spectrum
FIA
File Integrity Assessment
FIB
Forwarding Information Base
FIF
Fractal Image Format
FIFO
First-In, First-Out
FILO
First-In, Last-Out
FINDSTR
Find Strings
FIOS
(FiOS) Fiber Optic Services [Verizon]
FIP
File Processor Buffering
FIPS
Federal Information Processing Standard
FIR
Fast Infrared + Finite Impulse Response
.FIRM
Business or Firm (Domain Name) [Internet]
FIRST
Forum of Incident Response and Security Teams
FITS
Flexible Image Transport System
FIU
Fingerprint Identification Unit [Sony]
FIX
Federal Internet Exchange
FK
Foreign Key
FLA
Four Letter Acronym
FLC
Ferro-electric Liquid Crystal
FLD
Field
FLIR
Forward Looking Infrared (system)
FLL
FoxPro Link Library [Microsoft Fox Pro]
FLOPS
Floating Point Operations Per Second
.FLR
Folder (file name extension)
FLV
Flash Video
FM
Frequency Modulation
FMD
Fluorescent Multilayer Disk
FMRI
Functional Magnetic Resonance Imaging
FMS
Forms Management System
FMT
Format
FMV
Full Motion Video
FNT
Font
FOCUS
Forum of Control Data Users
FOD
Fax On Demand
FOG
First Osborne Group
FOIP
Fax Over Internet Protocol
FOIRL
Fiber Optic Inter Repeater Link [IEEE]
FOLDOC
Free On-Line Dictionary Of Computing
FOM
Fiber Optics Modem
.FON
Font + Phone + Phone Directory (all file name extensions)
.FOR
Fortran source code (file name extension)
FORTH
(Programming Language)(See HLL)
FORTRAN
Formula Translator (Programming Language)(See HLL)
FOSE
Federal Office Systems Exposition
FOSI
Format Option Specification Instance
FOSSIL
Fido/Opus/Seadog Standard Interface Layer
FPC
Flexible Printed Circuit + Floating Point Calculation
FPCE
Floating-Point C Extension (specification)
FPGA
Field Programmable Gate-Array
FPLA
Field Programmable Logic-Array
FPM
Fast Page Mode
FPP
Fixed Path Protocol + Floating Point Processor
FPR
Floating-Point Register
FPS
Favorite Picture Selection + Frames Per Second
FPT
Forced Perfect Termination
FPU
Floating Point Unit
FPX
FlashPix (format) [Kodak]
FQDN
Fully Qualified Domain Name [Internet]
FRAD
Frame Relay Access Device + Frame Relay Assembler/Disassembler
FRAG
Fragment + Fragmentation
FRAM
Ferroelectric Random-Access Memory
FRC
Functional Redundancy Checking
FRED
Frame Editor + Front-End to Dish
FRMR
Frame Reject
FRPI
Flux Reversals Per Inch
FRS
Family Radio Service
.FRS
WordPerfect Graphics Driver (file name extension)
FS
File Separator
FSB
Front Side Bus
FSD
File System Driver [OS/2]
FSE
Full Screen Editor
FSF
Free Software Foundation [Internet]
FSK
Frequency Shift Keying
FSN
Full Service Network
FSO
Free Space Optics
FSP
File Service Protocol
FSR
Free System Resources
FST
Flat Square Tube (monitor)
F/T
Full Time
FTAM
File Transfer, Access and Management + File Transfer and Access Method
FTL
Flash Transition Layer [Intel]
FTM
Flat Tension Mask [Zenith]
FTP
File Transfer Protocol [Internet]
FTPD
File Transfer Protocol Daemon
FTTB
Fiber To The Basement
FTTC
Fiber To The Curb
FTTN
Fiber To The Neighborhood
FTS
Federal Telecommunication System
FTX
Fault Tolerant Unix
FUI
File Update Information
FUNC
Function
FUS
Fast User Switching
FUSE
Far Ultraviolet Spectroscopic Explorer [JHUAPL]
FVT
Full Video Translation
FWTK
Firewall Toolkit
FXP
File Exchange Protocol
FYI
For Your Information
G
GA
General Availability
GAAP
Generally Accepted Accounting Principles
GAC
Global Assembly Cache
GAL
Generic Array Logic
GAMS
General Algebraic Mathematical System
GAPI
Gateway Application Programming Interface
GART
Graphics Address Relocation Table
GATT
Graphics Address Translation Table
GAWD
Global Access Wireless Database
Gb
Gigabit (1,024 megabits) + (One Billion Bits of Information)
GB
Gigabyte (1,024 megabytes) + (One Billion Characters of Information)
GCC
GNU C-Compiler [Unix]
GCCD
Glass-Passivated Ceramic Chip Diode
GCR
Group Code Recording
GDA
Global Data Area + GNOME Data Access
GDB
GNU Debugger
GDDM
Graphics Data Display Manager
GDG
Generation Data Group [IBM]
GDI
Graphical Device Interface
GDLC
Generic Data Link Control [IBM]
GDP
Graphic Draw Primitive
GDR
Gas Discharge Arrestor
GDT
Geometric Dimensioning and Tolerancing + Global Descriptor Table + Graphics Development Toolkit
GECOS
General Electric Comprehensive Operating System
GEIS
General Electric Information Service (company)
GEM
Graphics Environment Manager (DRI Program)
GENIE
General Electric Network for Information Exchange
GEO
Geostationary Earth Orbit
GEOS
Global Entity Ordering System +
GEOS
Graphic Environment Operating System [Geoworks]
GET
Get Execute Trigger
GFDL
GNU Free Documentation License
GFI
General Format Identifier + Ground-Fault Interceptor
GGP
Gateway-Gateway Protocol [Internet]
GHZ
Gigahertz
.GID
Topics (file name extension) [Microsoft]
.GIF
Graphics Interchange Format (file name extension)
GIG-E
Gigabit Ethernet
GIGO
Garbage In, Garbage Out
GII
Global Information Infrastructure
GILS
Government Information Locator Service
GIMP
GNU Image Manipulation Program
GIMPS
Great Internet Mersenne Prime Search
GINA
Graphical Identification and Authentication
GIS
Geographic Information System + Global Information Solutions [AT&T]
GIX
Global Internet Exchange [Internet]
GKS
Graphical Kernel System
GL
Graphics Language
G/L
General Ledger
GLIS
Global Land Information System [US Geological Survey]
GLL
Geograpic Position-Latitude/Longitude
GLM
General Linear Models
GLOBE
Global Learning by Observations to Benefit the Environment [Internet]
.GLY
Glossary (file name extension) [Microsoft Word]
GMDI
Gigabit Media-Dependent Interface
GML
Generalized Markup Language
GMP
Global Mobile Professional
GMR
Giant Magneto-Resistive (read head technology)
GMRS
General Mobile Radio Service
GMS
Global Management System + Global Messaging Service [Novell]
GMT
Greenwich Mean Time
GND
Ground (signal/system)
GNN
Global Network Navigator
GNU
Gnu's Not Unix (operating system)
GNOME
GNU Network Object Model Environment
GOAD
GNOME Object Activation Directory
GOS
Grade Of Service
GOSIP
Government Open Systems Interconnection Profile
.GOV
Governmental (Domain Name) [Internet]
GP
Gas Plasma + General Purpose
GPF
General Protection Fault
GPI
Graphics Programming Interface
GPIB
General Purpose Information/Interface Bus
GPIO
General Purpose Input/Output
GPL
General Public License
GPR
General Purpose Register [IBM]
GPRC
Glass Passivated Rectifier Chip
GPRS
General Packet Radio Service
GPS
Global Positioning Satellite/System + Global Product Specification
GPSS
* General Purpose Systems Simulator (language)
GPU
Graphics Processing Unit
GRADD
Graphics Adapter Device Driver [IBM]
GRE
Generic Routing Encapsulation + Graphics Engine
GREP
Global Regular Expression Print
.GRF
Graph (file name extension)
.GRP
Group (file name extension)
GS
Group Separator
GSI
General Server Interface
GSM
Global Shared Memory + Global System for Mobile-Communications (network)
GSNW
Gateway Service for NetWare [Microsoft]
GSP
Generic Server Passer + Global Service Provider
GSR
Gigabit Switch Router
GSTN
General Switched Telephone Network
GTE
General Telephone Electronics (corporation)
GTF
Generalized Timing Format
GTL
Graphic Template Library + Gunning Transceiver Logic
GTO
Guide To Operations [IBM]
GTP
* Geometry Theorem Prover
GTS
Generic Traffic Shaping [Cisco]
GUI
Graphical User Interface
GUID
Globally Unique Identifier + Global Universal Identifier
GVT
Global Virtual Time
GW-BASIC
Gee Whiz BASIC
GWES
Graphic, Windowing and Event Subsystem
.gz
Compressed file (compressed filename extension - using GNU gzip compression/decompression program) [Unix]
GZIP
GNU Zip
H
.H
Header (file name extension) [C]
HACMP
High Availability Cluster Multi-Processing [IBM]
HAL
Hard Array Logic + Hardware Abstraction Layer + House-Programmed Array Logic
HAL
* Heuristically Programmed Algorithmic (computer) [from 1968 movie "2001: A Space Odyssey"]
HAP
Host Access Protocol
HARP-MRI
Harmonic Phase MRI
HASP
Houston Automatic Spooling Priority (System)
HBA
Host Bus Adapter
HCL
Hardware Compatibility List
HCSS
High Capacity Storage System
HCT
Hardware Compatibility Test
HCU
Home Computer User
HD
Hard Disk + High Density
HDA
Head Disk Assembly
HDC
High Dependability Computing [Carnegie Mellon]
HDCD
High Definition Compatible Digital
HDCP
High-Bandwidth Digital Content Protection + High Definition Copy Protection
HDD
Hard Disk Drive
HDF
Hierarchical Data Format [NCSA]
HDI
Head to Disk Interference
HDL
Hardware Description Language
HDLC
High-Level Data Link Control
HDM
Hardware Device Module
HDMI
High-Definition Multimedia Interface
HDML
Handheld Device Markup Language
HDR
Header + High Data Rate + High Dynamic Range (photography)
.HDR
Header Data (file name extension)
HDSC
High Density Signal Carrier [DEC]
HDSL
High-Bit-Rate DSL + High-Data-Rate DSL
HDSS
Holographic Data Storage System
HDT
Host Digital Terminal
HDTV
High Definition Television
HDVD
High Definition Volumetric Display
HDW
Hardware
HDX
Half Duplex
HEOS
High Earth Orbiting Satellite
HERC
Hercules
HEX
Hexadecimal
HFC
Hybrid Fiber-Coaxial
HFS
Hierarchical File System [Macintosh]
HFT
High Function Terminal [IBM]
HGA
Hercules Graphics Adapter
HGCP
Hercules Graphics Card Plus
HGP
Human Genome Project
HH
Hour
HID
Human Interface Device
HIDS
Host-Based Intrusion Detection System
HIF
Hyper-G Interchange Format
HIFD
High-Density Floppy Disk
HIL
Human Interface Link [HP]
HIMEM
High Memory
HIPPI
High Performance Parallel Interface
HLA
High Level Architecture
HLCO
High Low Close Open
HLL
High Level Language
HLLAPI
High Level Language Application Programming Interface
.HLP
Help (file name extension)
HLQ
High Level Qualifier
HLS
Hue, Luminance, Saturation (color model)
HLT
Halt
HMA
High Memory Area [Microsoft] + Hub Management Architecture
HMD
Head Mounted Display
HMI
Human-Machine Interface
HMM
Hidden Markov Model
HMMP
Hyper-Media Management Protocol
HMOS
High Density Metal Oxide Semiconductor + High Speed Metal Oxide Semiconductor
HMP
Host Monitoring Protocol
HOL
High Order Logic
HOLAP
Hybrid OLAP
HOTT
Hot Off The Tree (electronic newsletter)
HOV
High Occupancy Vehicle
HP
Hewlett-Packard (Company)
HPC
Handheld Personal Computer
HPCC
High Performance Computing and Communications
HPDJ
Hewlett-Packard Desk Jet
HPFS
High-Performance File System
HPG
Hewlett-Packard Graphics
HPGL
Hewlett-Packard Graphics Language
HPIB
Hewlett-Packard Interface Bus
HPLJ
Hewlett-Packard Laser Jet
HPNA
Home Phoneline Networking Alliance
HPOM
Home Page Objects Model [Microsoft]
HPPA
Hewlett-Packard Precision Architecture
HPPI
High Performance Parallel Interface
HPR
High Performance Routing [IBM]
HPSB
High Performance Serial Bus
HPTL
High Performance Technical Computing
HPUX
Hewlett-Packard Unix
HPW
High Performance Workstation [Sun]
.HQX
BinHex (file name extension) [Macintosh]
HRIS
Human Resource Information System
HRG
High Resolution Graphics
HRMS
Human Resource Management System
HRTF
Head Related Transfer Function
HS
High Speed
HSB
Hue, Saturation, Brightness (color model)
HSC
Hierarchical Storage Controller + High Speed Channel
HSDPA
High Speed Download Packet Access
HSI
Hue, Saturation, Intensity
HSM
Hierarchical Storage Management
HSP
High Speed Printer/Processor
HSSI
High Speed Serial Interface
HST
High Speed Technology [U.S. Robotics]
.HST
History + Host (file name extensions)
HSV
Hue Saturation Value
HTL
Human In The Loop
HTML
HyperText Markup Language
HTTP
HyperText Transfer Protocol
HTTP-NG
HTTP Next Generation
HTTPS
HyperText Transfer Protocol Secure
HUD
Heads Up Display
HUT
Hopkins Ultraviolet Telescope
H/V
Horizontal/Vertical
HVD
Holographic Versatile Disc
HVP
Horizontal & Vertical Position
H/W
Hardware
HWCP
Hardware Code Page
HWD
Height-Width-Depth
HWDM
Hyperfine Wave Division Multiplexing
.HYP
Hyphenation (file name extension)
HYTELNET
Hypertext-browser for Telnet Accessible Sites
Hz
Hertz
I
IA
Intel Architecture [Intel]
IAB
Internet Architecture Board
IAC
Inter-Application Communication [Macintosh]
IAD
Integrated Access Device
IAEC
International Address Element Code
IAFIS
Integrated Automatic Fingerprint Identification System
IAG
Instruction Address Generation
IAK
Internet Access Kit [IBM]
IAL
* International Algorithmic Language (ALGOL was first called IAL)
IANA
Internet Assigned Numbers Authority
IAP
Internet Access Provider
IAS
Internet Access Server
IAT
Import Address Table
IAUP
Internet User Account Provider
IBC
Instrument Bus Computer
IBCS
Intel Binary Compatibility Specification
IBIP
Information Based Indicia Program [U.S. Postal Service]
IBL
Inbound Links [Google]
IBM
International Business Machines (Corporation)
IBM-GL
IBM Graphics Language
IC
Input Circuit + Integrated Circuit + Interrupt Controller
ICA
Intelligent Console Architecture + Intra-application Communications Area
ICANN
International Corporation for Assigned Names and Numbers
ICAP
Internet Calendar Access Protocol [Lotus]
ICAS
Intel Communicating Applications Specifications
ICB
Internet Citizen's Band
ICCP
Institute for the Certification of Computing Professionals
ICD
International Code Designator
ICE
In-Circuit Emulator [Intel] + Integrated Computing Environment [Langley Research] + Internal Compiler Error
ICES
Interference-Causing Equipment Standard
ICF
Internet Connection Firewall [Microsoft]
ICI
Image Component Information + Inter-CPU Interrupts
ICL
Interface Clear
ICLID
Incoming-Call Line Identification
ICM
Image Color Matching [Kodak] + Incoming Message
.ICM
Image Color Management (file name extension)
ICMP
Internet Control Message Protocol [Novell]
.ICO
Icon (file name extension)
ICOMP
(iCOMP)Intel Comparative Microprocessor Performance [Intel]
ICP
Image Coprocessor + Integrated Channel Processor
ICQ
I Seek You (messaging program)
ICR
Intelligent Character Recognition
ICS
Internet Connection Sharing [Microsoft] + Intuitive Command Structure
ICSAPI
Internet Connection Services API
ICU
Instruction-Cache Unit + Intel Configuration Utility [Microsoft] + ISA Configuration Utility
ID
Identification + Identifier
IDA
Integrated Digital Access + Intelligent Disk Array + Intelligent Drive Array
IDAPI
Integrated Database Application Programming Interface
IDC
Integrated Database/Desktop Connector + Internet Database Connector [Microsoft] + Internet Data Center
IDDE
Integrated Development & Debugging Environment [Symantec]
IDE
Imbedded Drive Electronics + Integrated Development Environment [Borland] + Integrated Device/Drive Electronics + Intelligent Drive Electronics + Interactive Design and Engineering + Interface Design Enhancement
IDEA
International Data Encryption Algorithm
IDEN
Integrated Data Enhanced Network
IDF
Intermediate Distribution Frame
IDI
Initial Domain Identifier
IDIV
Integer Divide
IDL
Interactive Data Language + Interface Definition Language
IDM
Integrated Document Management
IDMS
Integrated Data Base Management System
IDNX
Integrated Digital Network Exchange [IBM]
IDP
Integrated Data Processing
IDR
Intelligent Document Recognition
IDS
Image Display System + Intrusion Detection System
IDSL
Integrated Services Digital Network DSL
IDT
Interface Design Tool + Interrupt Descriptor Table
.IDX
Index (file name extension)
IE
Internet Explorer [Microsoft]
IEC
International Electrotechnical Commission
IEEE
Institute of Electrical and Electronics Engineers
IEF
Information Engineering Facility
IEMSI
Interactive Electronic Mail Standard Identification
IEN
Internet Engineering Notes
IETF
Internet Engineering Task Force
IESG
Internet Engineering Steering Group
I/F
Interface
IFC
Internet Foundation Classes
IFD
Image File Directory
IFF
Interchangeable File Format [Amiga]
IFG
Incoming Fax Gateway
IFP
Instruction Fetch Pipeline
IFS
Installable/Integated File System
IFSM
Information Systems Management
IGA
Integrated Graphics Array
IGC
Integrated Graphics Controller
IGES
Initial Graphics Exchange Standard
IGFET
Insulated-Gate Field Effect Transistor
IGMP
Internet Group Management/Multicast Protocol
IGP
Interior Gateway Protocol
IGRP
Interior Gateway Routing Protocol [Cisco]
IGS
Internet Go Server
IHD
Integrated Help Desk [IBM]
IHV
Independent Hardware Vendor
IIF
Immediate Interface
III
Interstate Identification Index [NCIC]
IIOP
Internet Inter-ORB Protocol
IIR
Immediate Impulse Response
IIS
Internet Information Server/Services [Microsoft]
IITF
Information Infrastructure Task Force
IKE
Internet Key Exchange
IKMP
Internet Key Management Protocol
IKP
Internet Keyed Payments [IBM]
ILA
Image Light Amplifier
ILE
Integrated Language Environment [IBM]
ILEC
Incumbent Local Exchange Carrier
ILM
Information Life-Cycle Management
ILP
Instruction-Level Parallelism
ILS
International Language Support
IM
Instant Messenger
IMAC
Internet Macintosh [Apple]
IMACS
Image Management and Communication System
IMAP
Interactive Mail Access Protocol + Internet Message Access Protocol
IMAX
Maximum Image
IMDB
In-Memory Database
IMDS
Image Data Stream (format) [IBM]
IME
Input Method Editor/Engine
IMEI
International Mobile Equipment Identifier
IMG
Image
.IMG
Image Data (file name extension)
IML
Initial Microcode Load [IBM]
IMP
Information/Interface Message Processor + Internet/Intranet Input Method Protocol
IMPA
Intelligent Multi-Port Adapter [DCA]
IMPI
Interoperable Message Passing Interface
IMPP
Internet Messaging and Presence Protocol
IMR
Internet Monthly Report
IMS
Information Management System + Intermediate Maintenance Standards
IMSI
International Mobile Subscriber Identifier
IMSP
Internet Message Support Protocol
IMTC
International Multimedia Teleconferencing Consortium
IMTV
Interactive Multimedia Television
IMUL
Integer Multiply
IMUX
Inverse Multiplexer
IN
Input
INC
Increment
.IND
Index (file name extension)
.INF
Information (file name extension)
.INFO
Information Services (Domain Name) [Internet]
INFS
Internet Network File System
.INI
Initialize (file name extension)
INIT
Initialization + Initialize
INM
Integrated Network Management
INND
Internet News Daemon
INS
Input String + Integrated Network Server
INT
Integer + Internal + Interrupt +
.INT
International Organization (Domain name) [Internet]
INTA
Interrupt Acknowledge
INTEL
Integrated Electronics (company)
INTERNIC
(InterNIC)Internet Network Information Center
INTO
Interrupt if Overflow occurs
I2O
Intelligent Input/Output
I/O
Input/Output
IOC
Inter-Office Channel
IOCC
Input/Output Channel Converter + Input/Output Controller Chip
IOCS
Input/Output Control System
IOCTL
Input/Output Control
IODE
Integrated Development and Debugging Environment [Symantec]
IOF
Infrared Optical Film
IOP
Input/Output Processor
IOPL
Input/Output Privilege Level
IOR
Interoperable Object Reference
IOS
Internet Operating System
IOSGA
Input/Output Support Gate Array
IP
Instruction Pointer + Intellectual Property + Internet Protocol
IPBF
Installed Peripheral Base Flexibility
IPC
Instructions Per Clock + Interprocess Communication
IPCMOS
Interlocked Pipeline CMOS [IBM]
IPCP
Internet Protocol Control Protocol
IPCS
Integrated PC Server
IPDC
Internet Protocol Device Control
IPDS
IBM Personal Dictation System [IBM] + Intelligent Printer Data Stream [IBM]
IPF
Invalid Page Format
IPFC
Information Presentation Facility Compiler [IBM]
IPI
Intelligent Peripheral Interface
IPL
Initial Program Load/Loader + Ion Projection Lithography
IPL
* Information Programming Language
IPM
Images Per Minute + Interpersonal Message
IPMI
Intelligent Platform Management Interface
IPNG
Internet Protocol, next generation
IPP
Integrated Performance Primitives [Intel] + Internet Printing Protocol
IPR
Intellectual Property Rights
IPSE
Integrated Project Support Environment
IPSEC
Internet Protocol Security
IPTC
International Press Telecommunications Council
IPTV
Internet Protocol Television
IPX
Internetwork Packet Exchange [Novell]
IQL
Interactive Query Language
IR
Infrared
IRC
Internet Relay Chat
IRD
Integrated Receiver/Descrambler
IRDA
(IrDA) Infrared Data Association
IRDS
Information Resource Dictionary System
IRET
Interrupt Return
IRF
Intermediate Routing Function + Inheritance Rights Filter [Novell]
IRL
Interactive Reader Language + Inter-Repeater Link
IRLAP
Infrared Link Access Protocol
IRLED
Infrared Light Emitting Diode
IRM
Information Resource Management + Inherent Rights Mask
IRP
I/O Request Packet
IRQ
Interrupt Request
IRQL
Interrupt Request Level
IRTF
Internet Research Task Force
IRX
Information Retrieval Experiment
IS
Information System + Interrupt Status
ISA
Industry Standard Architecture (bus) [IBM] + Instruction-Set Architecture
ISAKMP
Internet Security Association and Key Management Protocol
ISAM
Indexed Sequential-Access Management/Method
ISAPI
Internet Server API [Microsoft]
ISAPS
Intelligent Scene Analysis based on Photographic Space [Canon]
ISBN
International Standard Book Number
ISC
Instruction Set Computer + Inter-Systems Communication [IBM]
ISCSI
(iSCSI) Internet SCSI
ISD
Image Section Descriptor + Instructional Systems Design
ISDN
Integrated Services Digital Network
ISH
Information Super Highway
ISI
Internally Specified Index
ISIS
Integrated Systems and Information Services
ISKM
Internet Starter Kit for the Macintosh
ISL
Interactive System Language + Inter Switch Link [Cisco]
ISM
Integrated Services Model [IETF] + Internet Service Manager [Microsoft]
ISMF
Interactive Storage Management Facility
ISOC
Internet Society
ISO
International Organization for Standardization
ISP
Internet Service Provider + Interrupt Stack Pointer + Interrupt Status Port
ISPF
Interactive System Programming Facility
ISR
Information Storage and Retrieval + Interrupt Service Routine + Interrupt Status Register
ISRC
International Standard Recording Code
ISS
Internet Sharing Software
ISSN
International Standard Serial Number
ISV
Independent Software Vendor
IT
Information Technology
ITB
Information Technology Branch + Intermediate Text Block
ITC
International Typeface Corporation
ITE
Information Technology Equipment
ITF
Interactive Test Facility
ITIL
Information Technology Infrastructure Library
ITN
Identification Tasking and Networking
ITP
Internet Transaction Processing
ITR
Information Technology Research [NSF] + Input Transaction Record + Internet Talk Radio
ITSM
Information Technology Service Management
ITU
International Telecommunications Union
ITUG
International Telecommunications User Group
ITU-TIES
ITU-Telecom Information Exchange Services
ITU-TSS
ITU-Telecommunication Standards Section
ITV
Interactive Television
ITX
Intermediate Text Block
IU
Integer Unit
IUAP
Internet User Account Provider
IUS/ITB
Interchange Unit Separator/Intermediate Transmission Block
IVDS
Integrated Voice and Data Systems
IVIS
Interactive Video Information System
IVL
Independent Vendor League + Intel Verification Lab
IVR
Interactive Voice Recognition/Response
IVS
Interactive Videodisk System
IVT
Interrupt Vector Table
IV&V
Independent Verification & Validation
I-WAY
Information Highway
IXC
Interexchange Carrier
J
JA
Jump Address + Jump if Above
JAD
Joint Application Design/Development
JADE
Java Addition to the Default System
JAE
Jump if Above or Equal
JANET
Joint Academic Network
JAR
Java Archive (file format)
JAVAME
Java Platform Micro Edition
JAXM
Java API for XML Messaging
JBE
Jump if Below or Equal
JC
Jump if Carry set
JCA
Java Cryptography Architecture
JCE
Java Cryptography Extension
JCL
Job Control Language
JDBC
Java Database Connectivity
JDF
Job Description format
JDK
Java Development Kit
JDSL
Java Data Structures Library
JE
Jump if Equal
JEDEC
Joint Electronic Devices Engineering Council
JEIDA
Japanese Electronics Industry Development Association
JEPI
Joint Electronic Payment Initiative
JES
Job Entry System
JFC
Java Foundation Classes
JFET
Junction Field Effect Transistor
JFIF
JPEG File Interchange Format
JFS
Journaled File System [IBM]
JG
Jump if Greater
JGE
Jump if Greater or Equal
JHUAPL
Johns Hopkins University Applied Physics Laboratory
JIPS
JANET Internet Protocol Service
JIT
Just-In-Time (compiler)
JL
Jump if Less
JLE
Jump if Less than or Equal to
JLIP
Joint Level Interface Protocol
JMAPI
Java Management Application Program Interface
J2ME
Java 2 Platform Micro Edition
JMF
Java Media Framework [Sun]
JMI
Java Metadata Interface
JMP
Jump
JMS
Java Message Service
JMX
Java Management Extensions
JNA
Jump if Not Above
JNAE
Jump if Not Above or Equal
JNB
Jump if Not Below
JNBE
Jump if Not Below or Equal
JNG
Jump if Not Greater
JNGE
Jump if Not Greater or Equal
JNI
Java Native Interface
.JNK
Junk (file name extension)
JNLE
Jump if Not Less or Equal
JNO
Jump if No Overflow
JNP
Jump if No Parity
JNS
Jump if No Sign
JOE
Java Objects Everywhere
JOHNNIAC
* John Neumann Integrator and Automatic Computer [Rand Corp.]
JOSS
* Johnniac Open Shop System [Rand Corp.]
JOVIAL
Jules' Own Version of the International Algorithmic Language
JPE
Jump if Parity Even
JPEG
Joint Photographic Experts Group
JPL
Jet Propulsion Laboratory
JPNF
Join-Projection Normal Form
JPO
Jump if Parity Odd
JRE
Java Runtime Environment
JS
Jump if Sign
JSP
Java Server Page
JSR
Java Specification Request
JSSE
Java Secure Socket Extension
JTAG
Joint Test Action Group [IEEE]
JTAPI
Java Telephony Application Programming Interface
JZ
Jump if Zero
JNZ
Jump if Not Zero
JSS
Java-Script Style Sheet
JUGHEAD
Jonzy's Universal Gopher Hierarchy Excavation and Display [Internet]
JVM
Java Virtual Machine
K
K-12
Kindergarten through 12th Grade [US Education System]
KAM
Keep Alive Memory
Kb
Kilobit
KB
Keyboard + Kilobyte (1,024 bytes)
KBD
Keyboard (also KEYB)
KBD$
Keyboard [OS/2]
KBE
Knowledge Based Engineering
Kbps
Kilobits Per Second
KBps
Kilobytes Per Second
KDE
K Desktop Environment
KDT
Key Definition Table
KEFIR
Key Findings Reporter [GTE]
KEYBBE
Foreign language KEYBoard program - Belgium
KEYBBR
Foreign language KEYBoard program - Brazil
KEYBCF
Foreign language KEYBoard program - Canadian-French
KEYBCZ
Foreign language KEYBoard program - Czechoslovakia (Czech)
KEYBDK
Foreign language KEYBoard program - Denmark
KEYBFR
Foreign language KEYBoard program - France
KEYBGR
Foreign language KEYBoard program - Germany
KEYBHU
Foreign language KEYBoard program - Hungary
KEYBIT
Foreign language KEYBoard program - Italy
KEYBLA
Foreign language KEYBoard program - Latin America
KEYBNL
Foreign language KEYBoard program - Netherlands
KEYBNO
Foreign language KEYBoard program - Norway
KEYBPL
Foreign language KEYBoard program - Poland
KEYBPO
Foreign language KEYBoard program - Portugal
KEYBSF
Foreign language KEYBoard program - Swiss-French
KEYBSG
Foreign language KEYBoard program - Swiss-German
KEYBSL
Foreign language KEYBoard program - Czechoslovakia (Slovak)
KEYBSP
Foreign language KEYBoard program - Spain
KEYBSU
Foreign language KEYBoard program - Finland
KEYBSV
Foreign language KEYBoard program - Sweden
KEYBUK
Foreign language KEYBoard program - United Kingdom
KEYBUS
Foreign language KEYBoard program - United States
KEYBYU
Foreign language KEYBoard program - Yugoslavia
KHz
Kilohertz
KIF
Knowledge Interchange Format
KIPS
Kodak Internet Print Service [Kodak]
KIS
Knowbot Information Service [Internet]
KMZ
Keyhole Markup Language
KPI
Kernel Programming Interface
KQML
Knowledge Query and Manipulation Language
KRS
Knowledge Retrieval System
KSDS
Keyed Sequential Data Set
KSH
Korn Shell (program) [Unix]
KSPH
Keystrokes Per Hour
KSR
Keyboard Send Receive
KVM
Keyboard, Video, Mouse (switch) + Kilobyte Virtual Machine
L
L2F
Layer Two Forwarding [Cisco]
L2TP
Layer Two Tunneling Protocol
LADDR
Layered Device Driver Architecture [Microsoft]
LALL
Longest Allowed Lobe Length
LAN
Local Area Network
LANACS
Local Area Network Asynchronous Connection Server
LANDP
LAN Distributed Platform
LANE
Local Area Network Emulation
LANG
Language
LAP
Linux Application Platform
LAPB
Link Access Procedure Balanced (protocol)
LAPD
Link Access Procedure on the D-Channel (protocol)
LAPM
Link Access Procedure for Modems
LAR
Load Access Rights
LASER
Light Amplification by Stimulated Emission of Radiation
LASTport
Local Area Storage Transport (protocol) [DEC]
LAT
Local Access Terminal + Local Area Transport [DEC]
LATA
Local Access and Transport Area
LAVC
Local Area VAX Cluster
LAWN
Local Area Wireless Network
LB
Left Button (of 2 or 3 button Mouse)
LBA
Logical Block Addressing
LBL
Label
LBR
Librarian
.LBR
Library (file name extension)
LBT
Listen Before Talk
LBX
Local Bus Accelerator
LCA
Lotus Communications Architecture [Lotus]
LCC
Leadless Chip Carrier
LCCM
LAN Client Control Manager [IBM]
LCD
Liquid Crystal Display + Lowest Common Denominator
LCF
Low Cost Fiber
LCK
Library Construction Kit [Microsoft FoxPro]
LCOS
(LCoS) Liquid Crystal on Silicon
LCP
Link Control Protocol
LCR
Least Cost Routing + Line Control Register
LCS
Link Connection Subsystem
LCSD
Laminate Chip Signal Diode
LCU
Last Cluster Used
LDA
Logical Device Address
LDAP
Lightweight Directory Access Protocol [IBM]
LDC
Lotus Development Corporation
LDDS
Long Distance Discount Services (company)
LDM
Logical Disk Manager + Long Distance Modem
LDP
Label Distribution Protocol
LDT
Local Descriptor Table
LE
Less or Equal
LEA
Load Effective Address
LEAD
Live Early Adoption and Demonstration [W3C]
LEAF
Law Enforcement Access Field
LEC
Local Area Network Emulation Client + Local Exchange Carrier
LED
Light Emitting Diode
LEL
Link, Embed and Launch-to-edit [Lotus]
LEM
Language Extension Module
LEN
Low Entry Networking
LEO
Low Earth Orbit
LEP
Light-Emitting Polymers
LES
Local Area Network Emulation Server
.LET
Letter (file name extension)
LEX
Lexicon
LF
Line Feed
L2F
Layer 2 Forwarding (protocol) [Cisco]
LFAP
Lightweight Flow Admission Protocol
LFE
Low Frequency Effects
LFI
Last File Indicator
LFM
Log File Monitor
LFN
Long File Name
LFT
Low Function Terminal [IBM]
LFU
Least Frequently Used
LGA
Leadless Grid Array
LGDT
Load Global Descriptor Table
LGPL
Lesser General Public License [GNU]
LIAS
Library Information Access System
.LIB
Library (file name extension)
LIC
Line Interface Coupler [IBM]
LICS
Lotus International Character Set [LDC]
LIDT
Load Interrupt Descriptor Table
LIEP
Large Internet Exchange Packet [Novell]
LIF
Low Insertion Force
LIFO
Last In, First Out
LILO
Last In, Last Out
LIM
Lotus/Intel/Microsoft
LIMA
Lotus/Intel/Microsoft/AST
LIMDO
Light Intensity Modulation Direct Overwrite
LIMM
Light Intensity Modulation Method
LIMS
Library Information Management System
LINQ
Language Integrated Query
LINUX
(Operating system named after Linus Torvalds)
LIP
Large Internet Packet
LIPO
(LiPo) Lithium Polymer (battery)
LIPS
Lightweight Internet Person Schema + Logical Inferences Per Second
LISP
List Processing (Language)(See HLL)
LISTSERV
List Server [Internet]
LIU
LAN Interface Unit
LIW
Long Instruction Word
LLC
Logical Link Control
LLDT
Load Local Descriptor Table
LLF
Low Level Format
LLTD
Link Layer Topology Discovery (protocol)
LMB
Left Mouse Button
LMBCS
Lotus Multi-Byte Character Set [Lotus]
LMD
Last Modification Date
LMDS
Local Multipoint Distribution Service
LMI
Link/Local Management Interface
LMOS
Leave Mail On Server
LMR
Land Mobile Radio
LMS
Lotus Messaging Switch [Lotus]
LMSW
Load Machine Status Word
LMU
LAN Management Utilities [IBM] + LAN Manager for Unix
LN
Load Number + Logarithm (Natural)
LNA
Local Network Administrator
LN:DI
Lotus Notes:Document Imaging
LNK
Link
LOB
Line of Business
LOC
Lines Of Code + Loop On-Line Control
LOCIS
Library of Congress Information System
LOD
Letter Of Destruction + Level Of Detail
LODSB
Load String Byte
LOG
Logarithm (Base 10)
LOGO
(Programming Language)(See HLL)
LON
Local Operating Network
LOOPE
Loop while Equal
LOOPNE
Loop while Not Equal
LOOPNZ
Loop while Not Zero
LOOPZ
Loop while Zero
LORE
Line Oriented Editor
LPAR
Logic Programming and Automated Reasoning
LPC
Local Procedure Call
LPD
Line Printer Daemon (protocol) [Berkley]
LPDU
Logical Protocol Data Unit
LPI
Lines Per Inch
LPL
Lotus Programming Language [Lotus 1-2-3] [LDC]
LPM
Lines Per Minute
LPN
Logical Page Number
LPR
Line Printer + Line Printer Remote
LPS
Low-Power Schottky
LPT
Line Printer Terminal
LPT1
First Parallel Printer Port
LPT2
Second Parallel Printer Port
LPT3
Third Parallel Printer Port
LQ
Letter Quality
LQM
Link Quality Monitoring (protocol)
LR
Link Register
LRC
Local Register Cache + Longitudinal Redundancy Check
LRL
Least Recently Loaded
LRM
Language Reference Manual + Least Recently-Used Master
.LRS
Language Resource (file name extension) [WordPerfect]
LRU
Least Recently Used
LSA
LAN and SCSI Adapter [IBM] + Line Sharing Adapter + Local Security Authority [Microsoft]
LSAPI
License Services Application Program Interface
LSASS
Local Security Authority Subsystem Service [Microsoft]
LSB
Least Significant Bit
LSC
Least Significant Character
LSD
Least Significant Digit
LSI
Large Scale Integration
LSL
Link Support Layer + Load Segment Limit
LSP
Layered Service Provider [Spybot]
LSPR
Logistics System Program Review
LST
List
.LST
List (file name extension)
LTO
Linear Tape Open
L2TP
Layer 2 Transport/Tunneling Protocol
LTPS
Low-Temperature Polysilicon
LTR
Left-To-Right + Letter + Load Task Register
LU
Logical Unit (Also LUN)
LUA
Logical Unit Application (interface)
LUI
Local User Input
LUIS
Library User Information Service
LUN
Logical Unit Number
LUT
Lookup Table
LV
Logical Volume [IBM]
LVDS
Low-Voltage Differential Signaling
LVM
Logical Volume Management [IBM]
LW
Lazy Write
.LYR
Lyrics (music file name extension)
LZW
Lempel-Ziv-Welch (algorithm)
M
mA
Milliampere
MAC
Macintosh (Apple Macintosh Computer) + Mandatory/Media/Medium Access Control + Message Authentication Code
MAC
* Multiple Access Computers
.MAC
MacPaint (file name extension) + Macro (file name extension)
MACH
Multilayer Actuator Head [Epson]
MADE
Manufacturing and Automated Design Engineering
MADYMO
Mathematical Dynamic Modeling [TNO]
MAE
Merit Access Exchange + Metropolitan Area Ethernet
MAGMA
Minimal Architecture for Generalized Markup Applications
MAH
(mAh)Milliampere-Hour
MAI
Multiple Applications Interface
.MAI
Mail (file name extension)
MAJC
Microprocessor Architecture for Java Computing [Sun]
MALWARE
Malicious Software
MAN
Manual [Unix] + Metropolitan Area Network
MANIAC
* Mathematical Analyzer Numerical Integrator and Computer
MANPAGE
Manual Page [Unix]
MAP
Maintenance Analysis Procedures + Manufacturing Automation Protocol + Memory Allocation Map
.MAP
Linker Map (file name extension)
MAPI
Mail/Messaging Applications Programming Interface [Microsoft]
MAPICS
Manufacturing, Accounting and Production Information Control System [IBM]
MARC
Machine Readable Cataloging + Multi-Technology Automated Reader Card
MARVEL
Machine-Assisted Realization of the Virtual Electronic Library [Library of Congress]
MASM
Macro Assembler [Microsoft]
MASS
Maximum Availability and Support Subsystem [Parallan]
MAT
Maintenance Access Terminal
MAU
Media Access/Adapter Unit + Multistation Access Unit
MAVDM
Multiple Application VDM
MAX
Maximum
MB
Megabyte (1,024 kilobytes) + Middle Button (of 3 button Mouse)
MBASIC
Microsoft BASIC [Microsoft]
MBCS
Multi-Byte Character Set [IBM]
MBONE
Multicast Backbone [Internet]
MBps
Megabytes Per Second
Mbps
Megabits Per Second
MBR
Master Boot Record
MBX
Mailbox
MCA
Micro Channel Adapter/Architecture [IBM]
MCAD
Mechanical Computer Aided Design
MCB
Memory Control Block
MCF
Meta Content Framework + Microsoft Connector Framework [Microsoft]
MCGA
Multicolor Graphics Array
MCH
Memory Controller Hub [Intel]
MCI
MCI Communications Corp. (name from initials of original company - Microwave Communications, Inc.) + Media Control Interface [Microsoft]
MCL
Microsoft Compatibility Labs [Microsoft]
MCM
Multi-Chip Module
MCNE
Master Certified Novell Engineer [Novell]
MC-PGA
Metallized Ceramic - Pin Grid Array
MCPS
Microsoft Certified Product Specialist [Microsoft]
MC-QFP
Metallized Ceramic - Quad Flat Pack
MCR
Modem Control Register
MCSD
Microsoft Certified Systems Developer [Microsoft]
MCSE
Microsoft Certified Systems Engineer [Microsoft]
MCU
Microcontroller Unit + Multi-Chip Unit [DEC] + Multipoint Control Unit
MD
Make Directory + Mini Disk [Sony] + Monochrome Display
MDA
Mail Delivery Agent + Model Drive Architecture + Monochrome Display Adapter + Multidimensional Analysis
MDDBMS
Multidimensional Data Base Management System
.MDF
Menu Definition File (file name extension)
MDI
Memory Display Interface + Multiple Document Interface
MDIC
Manchester Decoder and Interface Chip [AT&T]
MDK
Multimedia Developers Kit [Microsoft]
MDLP
Mobile Data Link Protocol
MDR
Metadata Repository + Minimum Design Requirement
MDX
Multi-Dimensional Expressions
MDY
Month Day Year
.ME
Opening Information (file name extension) (As in READ.ME)
MEB
Memory Expansion Board
MED
Minimum Expected Delay
MEG
Megabyte
MEM
Memory
MEMS
Micro-Electro-Mechanical System
.MEN
Menu (file name extension)
MERCI
Multimedia European Research Conferencing Integration
MES
Manufacturing Execution System
MESI
Modified, Exclusive, Shared and Invalid (protocol)
MESSENGER
Mercury Surface, Space Environment, Geochemistry and Ranging [JHUAPL]
MET
Memory Enhancement Technology [Hewlett-Packard]
.MET
Metafile (file name extension)
MFC
Microsoft Foundation Class [Microsoft]
MFFS
Microsoft Flash File System [Microsoft]
MFI
Multifunction Interpreter
MFIOP
Multifunction I/O Processor
MFLOPS
Million Floating Point Operations Per Second
MFM
Modified Frequency Modulation
MFP
Multi-Function Peripheral/Printer/Product
MFPI
Multifunction Peripheral Interface
MFS
Macintosh File System [Macintosh] + Magnetic Tape Field Search + Memory File System Modified Filing System [Revelation Technologies]
MFT
Master File Table + Multiprogramming with a Fixed number of Tasks
MGA
Monochrome Graphics Adapter
MGCP
Media Gateway Control Protocol
MGE
Modular GIS Environment
MGET
Multiple Get [Unix]
MGML
Minimal Generalized Markup Language
MGR
Manager
MHS
Message Handling Service + Message Handling System
MHz
Megahertz
MI
Management Interface
MIB
Management Information Base
MIC
Message Integrity Check + Microphone
MICR
Magnetic Ink Character Recognition
MICRO
One-millionth
MICS
Macro Interpretive Commands
MID
Mobile Information Device
MIDI
Musical Instrument Digital Interface
MIDP
Mobile Information Device Profile
MIF
Management Information Format
.MIF
Management Information Files (file name extension)
MIG
Metal In Gap
MII
Microsoft/IBM/Intel
MIL
Machine Interface Layer [Go Corporation] +
.MIL
Military (Domain name) [Internet]
MIM
Map Image Metafile + Metal-Insulator-Metal (screen)
MIMD
Multiple Instruction Multiple Data Stream (processor)
MIME
Multimedia Internet Message Extensions + Multipurpose Internet Mail Extensions
MI/MIC
Mode Indicate/Mode Indicate Common
MIMO
Multiple Input, Multiple Output
MIN
Minimum + Mobile Identification Number
MIND
Microsoft Internet Developer [Microsoft]
MINUET
Minnesota Internet Users Essential Tools [Internet]
MIPS
Million Instructions Per Second
MIR
Music Information Retrieval
MIRAM
Magnetoresistive Random Access Memory
MIS
Management Information System + Multimedia Information Sources [Internet]
MISC
Miscellaneous
MIX
Member Information Exchange
.MIX
Microsoft Picture It! (format)
MKDIR
Make Directory
MKL
Math Kernal Library [Intel]
ML
Machine Language + Meta Language
MLAPI
Multilingual Application Programming Interface
MLC
Multilayer Ceramic + Multilevel Cell (program) [Internet]
MLE
Multi-Line Editor
MLI
Mobile Linux Initiative
MLID
Multi-Link Interface Driver
MLM
Mailing List Manager [Internet]
MLP
Meridian Lossless Packing
MLPPP
Multilink PPP
MM
Minutes + Month
MMA
Microcomputer Managers Association
MMC
Matched Memory Cycle + Microcomputer Marketing Council + Microsoft Management Console [Microsoft] + MultiMedia Card
MMCD
MultiMedia Compact Disk
MMCX
Multimedia Communication Exchange [Lucent Technologies]
MMDS
Multi-channel Multipoint Distribution Service
MMF
Multi Mode Fiber (cable)
MMI
Man-Machine Interface
MMIS
Materials Manager Information System
MMPM
Multi Media Presentation Manager
MMS
Multimedia Messaging Service
MMU
Memory Management Unit
MMVF
Multimedia Video File [NEC]
MMX
Matrix Manipulation Extensions [Intel] + Multimedia Extensions
MNOS
Metal Nitride Oxide Semiconductor
MNP
Microcom Networking Protocol [Microcom]
.MNU
Menu (fine name extension)
MO
Magneto-Optical (disk drive)
MOB
Memory-Order Buffer
MOBO
Mother Board
MOD
Module + Modulus
MODEM
Modulator/Demodulator
MOHLL
Machine Oriented High Level Language
MOLAP
Multidimensional On-Line Analytical Processing
MOM
Manufacturing Operations Management + Message-Oriented Middleware + Microsoft Office/Operations Manager [Microsoft]
MONET
Multiwavelength Optical Networking
MONO
Monaural
MOO
MUD, Object Oriented [Internet]
MOP
Maintenance Operations Protocol
MOPS
Million Operations Per Second
MOS
Magneto-Optic Storage + Mean Opinion Score + Metal Oxide Semiconductor
MOSFET
Metal Oxide Semiconductor Field Effect Transistor
MOSPF
Multicast Open Shortest Path First
MOTD
Message Of The Day
MOV
Metal Oxide Varistor + Move
MOVS
Move String
MP
Massively Parallel (processing) + Megapixel + Multiple Processors
MP3
MPEG Audio Layer 3
.MPA
Memo Pad Archive (file name extension) [Palm]
MPC
Multimedia Personal Computer + Multipath Channel
MPCS
Mission Planning and Control Station (Software)
MPE
Multiple Programming Executive [HP]
MPEG
Moving Picture Experts Group
MPI
Message Passing Interface + Multiprecision Integer
MPLS
Multi Protocol Label Switching
MPM
Message Passing Library [IBM]
MPMD
Multiple Processor/Multiple Data
MPOA
Multi-Protocol over Asynchronous-Transfer-Mode
MPP
Massively Parallel Processing/Processors + Message Posting Protocol + Message Processing Program
MPQP
Multi-Protocol Quad Port [IBM]
MPR
Multipart Repeater + Multi Protocol Router [Novell]
MPS
Multiprocessor Specification
MPTN
Multi-Protocol Transport Network
MPTS
Multi-Protocol Transport Services
MPU
Microprocessor Unit
MQI
Messaging and Queuing Interface [IBM]
MR
Magneto Resistive + Modem Ready
MRAM
Magnetic Random Access Memory
MRCF
Microsoft Realtime Compression Format
MRCI
Microsoft Realtime Compression Interface
MRI
Magnetic Resonance Imaging
MRM
Most Recently-Used Master
MRO
Multi-Region Operation
MRP
Manufacturing Resources Planning + Materials Requirement Planning
MRPL
Main Ring Path Length
MRS
Media Recognition System
MRT
Mean Repair Time
MRU
Maximum Receive Unit + Most Recently Used
MS
Memory System + Message Store + Microsecond + Microsoft Corporation + Millisecond
MSACM
Microsoft Audio Compression Manager [Microsoft]
MSAU
Multi-Station Access Unit
MSAV
Microsoft Anti Virus [Microsoft]
MSB
Most Significant Bit
MSBF
Mean Swaps Between Failures
MSC
Mobile Switching Center
MSCDEX
Microsoft Compact Disc Extensions [Microsoft]
MSCE
Microsoft Certified Software Engineer [Microsoft]
MSCHAP
Microsoft Challenge Handshake Authentication Protocol [Microsoft]
MSCL
Microsoft Community License [Microsoft]
MSCS
Microsoft Cluster Server [Microsoft]
MSD
Mass Storage Device + Most Significant Digit + Microsoft System Diagnostics [Microsoft]
MSDE
Microsoft Data Engine [Microsoft1)
MSDN
Microsoft Developer Network [Microsoft]
MS-DOS
Microsoft - Disk Operating System [Microsoft]
MSDR
Multiplexed Streaming Data Request
MSDS
Microsoft Developer Support [Microsoft]
MSFR
Minimum Security Function Requirements [IBM]
MSG
Message
.MSG
Program Message (file name extension)
MSGINA
Microsoft Graphical Identification and Authentication [Microsoft]
MSI
Medium Scale Integration
MSIE
Microsoft Internet Explorer [Microsoft]
MSIMN
Microsoft Internet Mail and News [Microsoft]
MSL
Map Specification Library + Master Subsidy Lockcode + Mirrored Server Link
MSLU
Microsoft Layer for Unicode [Microsoft]
MSMQ
Microsoft Message Queue-Server [Microsoft]
MSN
Microsoft Network [Microsoft]
MSO
Multiple Service/Systems Operator
.MSP
Microsoft Paint (file name extension) [Microsoft]
MSPL
Microsoft Permissive License [Microsoft]
MSQL
Mini SQL
MSR
Microsoft Reserved Partition [Microsoft]
MSRL
Microsoft Reference License [Microsoft]
MSRP
Manufacturer Suggested Retail Price
MSS
Mass Storage System + Multiprotocol Switched Services [IBM]
MSTS
Microsoft Terminal Server [Microsoft]
MSW
Machine Status Word
MSXML
Microsoft XML [Microsoft]
MTA
Mail Transport Agent + Message Transfer Agent + Multimedia Terminal Adapter + Multiple Terminal Access + Multithreaded Architecture
MTBB
Mean Time Between Breakdowns
MTBF
Mean Time Between Failures
MTBJ
Mean Time Between Jams
MTF
Microsoft Tape Format [Microsoft] + Modulation Transfer Function
MTH
Memory Translator Hub
MTOM
Message Transformation Optimization Mechanism
MTRP
Maximum Transfer Rate Performance
MTS
Message Transfer Service/System + Microsoft Transaction Server [Microsoft] + Mobile Telephone Sysem + Multichannel Television Sound
MTSO
Mobile Telephone Switching Office
MTST
Magnetic Tape Selectric Typewriter [IBM]
MTT
Multi-Transaction Timer
MTTD
Mean Time To Diagnose
MTTF
Mean Time To Failure
MTTR
Mean Time To Repair
MTU
Maximum Transfer/Transmission Unit
MUA
Mail User Agent
MUD
Multi-User Dialogue/Dimension/Domain/Dungeon [Internet]
MUG
Multiuser Game
MUI
Multilingual User Interface [Microsoft]
MUL
Multiply
MULTICS
Multiplexed Information and Computing Service
MUMPS
Massachusetts General Hospital Utility Multi-Programming System (Programming Language)
MUSE
Multi-User Shared Environment
.MUSEUM
Museums (Domain Name) [Internet]
MUSIC
Multiparty Multimedia Session Control
MUT
Monitor Under Test
MUX
Multiplexer
mV
Millivolt
MVB
Multimedia Viewer Book
MVC
Multimedia Viewer Compiler
MVD
Multivalued Dependencies
MVDM
Multiple Virtual DOS Machines
MVGA
Monochrome Video Graphics Array
MVIP
Multi-Vendor Integration Protocol
MVP
Multimedia Video Processor
MVS
Multiple Virtual Storage
MVT
Multiprogramming with a Variable number of Tasks
MX
Mail Exchanger [Internet]
MXS
Microsoft Exchange Server [Microsoft]
MZR
Multiple Zone Recording
N
NAC
Network Adapter Card
NACD
National Association of Computer Dealers
NACS
National Advisory Committee on Semiconductors
NAE
Not Above or Equal
NAK
Negative Acknowledgment
NAKA
Not Acknowledge
NAL
Novell Application Launcher [Novell]
NAM
Number Assignment Module
.NAME
Names-Individuals (Domain Name) [Internet]
NAMPS
Narrow-Band Analog Mobile Phone Service [Motorola]
NAND
Not And
NANO
One thousand-millionth
NANOMETER
One billionith of a meter
NAP
Network Access Point
NAPLPS
North American Presentation Level Protocol Syntax (graphics)
NAS
Network Access Server + Network Application Support [DEC] + Network Attached Storage
NASA
National Aeronautics and Space Administration
NASDAQ
National Association of Securities Dealers Automatic Quotation
NASI
NetWare Asynchronous Services Interface [Novell]
NASIRC
NASA Automated Systems Internet Response Capability
NASKER
NASA Ames Kernel (benchmark)
NAT
Network Address Transformation/Translation
NAU
Network Addressable Unit
NAWS
Negotiate About Window Size
NBE
Not Below or Equal
NBI
Nothing But Initials
NBMA
Non-Broadcast Multi Access
NBS
Narrowband Socket + National Bureau of Standards + Numeric Backspace
NC
Network Computer + No Carry + Numerical Control
NCA
Network Communications Adapter + Network Computing Architecture [Oracle]
NCC
Network Control Center
NCD
Network Computing Device
.NCF
Netware Command File [Novell]
NCGA
National Computer Graphics Association
NCIC
National Crime Information Center
NCMT
* Numerical Control for Machine Tools
NCOS
Network Computer Operating System
NCP
NetWare Core Protocol + Not Copy Protected + Network Control Panel/Processor/Program/Protocol
NCR
National Cash Register (Company)
NCSA
National Center for Supercomputing Applications
NCSC
National Computer Security Center
NCSI
Network Communications Services Interface [Network Products Corp.]
NDB
Non-Directional Beacon
NDDK
Network Device Development Kid [Microsoft]
NDEF
Not to be Defined
NDIS
Network Device/Driver Interface Specification
NDL
Network Data Language
NDMP
Network Data Management Protocol
NDN
Non-Delivery Notice
NDP
Numeric Data Processor
NDR
Network Data Representation
NDRO
Non-Destructive Read Out
NDS
NetWare Directory Service [Novell]
.NDX
Index (file name extension)
NEC
Nippon Electric Company
NED
NASA Extragalactic Database [NASA]
NEG
Negative + Negate
NEMA
National Electrical Manufacturers Association
NEP
Network Entry Point
NES
National Education Supercomputer
NEST
Novell Embedded Systems Technology [Novell]
.NET
Networks (Domain Name) [Internet]
NetBIOS
Network Basic Input/Output System [IBM]
NetBEUI
NetBIOS Extended User Interface [IBM]
NETMON
Network Monitor
.NEW
New Information (file name extension)
NEWS
NetWare Early Warning System [Frye Computer] + Network Extensible Window System
NEWS.
Current events [USENET Newsgroup Category]
NEXT
Near-End Crosstalk
NFF
No Fault Found
NFS
Network File System [Sun]
NG
No Good
NGE
Not Greater or Equal
NGI
Next-Generation Internet
NHC
National Hurricane Center
NHR
National Handwriting Recognition
NHRP
Next Hop Resolution Protocol
N/I
Non-Interlaced
NIA
Next Instruction Address
NIC
Network Information Center [Internet] + Network Interface Card + Numeric Intensive Computing
NICAD
Nickel-Cadmium
NICOLAS
Network Information Center OnLine Aid System [NASA]
NID
New Interactive Display [NEC] + Next ID
NIDS
Network Intrusion Detection System [Unisys]
NII
National Information Infrastructure
NIM
Network Installation Management [IBM]
NIMH
(NiMH) Nickel-Metal Hydride
NIO
Native Input/Output + New Input/Output
NIPS
Network I/Os Per Second
NIR
Network Information Retrieval
NIS
Network Information Service [Unix]
N-ISDN
Narrowband ISDN + National ISDN
NISO
National Information Standards Organization
NISP
Networked Information Services Project
NIST
National Institute for Standards and Technology
NITC
National Information Technology Center
NIU
Network Interface Unit
NJE
Network Job Entry (protocol) [IBM]
NL
New Line
NLB
Network Load Balancing [Microsoft]
NLE
Not Less or Equal
NLM
NetWare Loadable Module [Netware]
NLP
Natural-Language Processing
NLQ
Near Letter Quality
NLSFUNC
National Language Support Function
NLV
National Language Version [IBM]
NMI
Non-Maskable Interrupt
NMM
NetWare Management Map [NetWare]
NMOS
Negative Channel Metal-Oxide Semiconductor
NMP
Network Management Protocol [AT&T]
NMS
Network Management System [Novell]
NN
Network Node + No News [Internet]
NNI
Network to Network Interface
NNM
Network Node Manager
NNTP
Network News Transfer Protocol [Internet]
NOAA
National Oceanic Atmospheric Administration
NOC
Network Operations Center
.NOM
Individual with Personal Site (Domain Name) [Internet]
NOP
No Operation
NOPAC
Network OPAC
NOR
Not Or
NOS
Network Operating System
NPA
Network Printer Alliance + Numbering Plan Area
NPI
Network Printer Interface
NPL
Nonprocedural Language
NPN
Negative Positive Negative (bipolar transistor)
NPS
Novell Productivity Specialist [Novell]
NPT
Non-Programmable Terminal
NPTN
National Public Telecomputing Network
NPU
Natural Processing Unit
NPX
Numeric Processor Extension
NQS
Network Queuing System [Cray]
N(r)
Number Returned
NRC
National Research Council (Canada)
NREN
National Research and Education Network
NRM
Network Resource Manager + Normal Response Mode
NRZ
Not Return to Zero
NRZI
Non Return to Zero Inverted
NS
Nanosecond (one-billionth of a second) + National Semiconductor (as in Ns16550 UART) + Network Supervisor + Non Stop
NSAP
Network Service Access Point
NSAPI
Netscape Server API [Netscape]
NSA POLY
National Security Agency Polygraph
NSERC
National Sciences and Engineering Research Council (Canada)
NSF
National Science Foundation
NSFNET
National Science Foundation Network
NSI
NASA Science Internet
NSLOOKUP
Name Server Lookup [Unix]
NSM
Netscape Server Manager [Netscape]
NSP
Native Signal Processing [Intel] + Network Service Provider
NSSC
NASA Standard Spacecraft Computer
NSTC
National Science and Technology Council
NSTL
National Software Testing Labs
NT
New Technology [Microsoft]
NT-1
Network Terminator Type 1
NTAS
NT Advanced Server [Microsoft]
NTF
No Trouble Found
NTFS
New Technology File System [Microsoft]
NTIA
National Telecommunications and Information Administration
NTIS
National Technical Information Service
NTLDR
New Technology Loaders [Microsoft]
NTP
Network Time Protocol
NTRAS
NT Remote Access Services [Microsoft]
NTSA
NetWare Telephony Services Architecture [Novell]
NTSC
National Television Standards Committee
NTU
Network Termination Unit
NUI
Network User Identification + Network User Interface + Notebook User Interface [Go Corporation]
NUL
Null + (dummy device) + (no device)
NUMA
Non-Uniform Memory Access
NV
No Overflow
NVM
Non-Volatile Memory
NVOD
Near-Video On Demand
NVP
Nominal Velocity of Propagation
NVRAM
Non-Volatile Random Access Memory
NVT
Network Virtual Terminal + Novell Virtual Terminal [Novell]
NWS
NetWare Web Server [Netware]
NYM
Anonymous
O
OAB
One-to-All Broadcast
OAD
Open Architecture Driver [Bernoulli]
OAG
Official Airline Guide + Online Air Guide
OAI
Open Applications Interface
OAS
One-to-All Scatter
OASIS
Organization for the Advancement of Structured Information Standards
OBD
On Board Diagnostics
OBEX
Object Exchange [Borland]
OBJ
Object
OC
Optical Carrier
OCE
Open Collaborative Environment [Apple]
OCF
Objects Components Framework [Borland]
OCL
Object Constaint Language + Operation Control Language + Operator Control Language
OCR
Optical Character Recognition
OCS
On-Card Sequencer
OCSP
Online Certificate Status Protocol
OCX
OLE Custom Control
ODA
Open Document Architecture
ODAPI
Open Database Application Programming Interface [Borland]
ODBC
Object-Oriented Database Connectivity + Open Database Computing + Open Data Base Connectivity [Microsoft]
ODBMS
Object-Oriented Database Management System (also see OODMS)
ODI
Open Datalink Interface [Novell] + Open Device Interconnect [NetWare]
ODIF
Open Document Interchange Format
ODL
Object Definition Language
ODM
Object Data Manager [IBM] + Optimized Distribution Model [Compaq]
ODMA
Open Document Management API
ODP
Open Distributed Processing
ODS
Open Data Services [Microsoft] + Operational Data Store
ODSI
Open Directory Service Interface [Microsoft]
ODT
Open Desktop
OEL
Organic Electroluminescent (display)
OEM
Original Equipment Manufacturer
OEP
Operand Execution Pipeline
OF
Overflow Flag
OFB
Output Feedback (mode)
OFDM
Orthogonal Frequency Division Multiplexing
OFMT
Output Format for Numbers
OFS
Object File System [Microsoft] + Output Field Separator
OFX
Open Financial Exchange
OGSA
Open Grid Services Architecture
OGSI
Open Grid Services Infrastructure
OH
Off Hook
OHCI
Open Host Controller Interface
OID
Object Identifier
OIDL
Object Interface Definition Language
OIS
Office Information System + Optical Image Stabilizer
OLAP
Online Analytical Processing
OLCP
Online Complex Processing
.OLD
Old version (file name extension)
OLE
Object Linking and Embedding [Microsoft]
OLED
Organic Light Emitting Diode
OLGA
Online Guitar Archive
OLI
Optical Line Interface [AT&T]
OLMC
Output Logic Macrocell
OLSP
Online Service Provider
OLTP
Online Transaction Processing
OM
Object Manager
OMA
Object Management Architecture [Microsoft]
OME
Open Messaging Environment (protocol)
OMF
Object Module Format [Microsoft] + Open Media Framework + Open Message Format
OMG
Object Management Group
OMI
Open Messaging Interface [Lotus]
OML
Object Manipulation Language
OMR
Optical Mark Recognition
ONC
Open Network Computing [Sun]
ONDS
Open Network Distribution Services [IBM]
ONE
Open Network Environment [Netscape]
ONMS
Open Network Management System
ONU
Optical Network Unit
OOAD
Object-Oriented Analysis and Design
OOB
Out Of Band
OODB
Object-Oriented Database
OODMS
Object-Oriented Database Management System (also see ODBMS)
OOL
Object-Oriented Language
OOOS
Object-Oriented Operating System
OOPL
Object-Oriented Programming Language
OOPS
Object Oriented Programming and Systems
OOS
Object-Oriented Systems + Off-line Operating Simulator
OOT
Object-Oriented Technology
OOUI
Object Oriented User Interface
OP
Operation + Optical + Output
OPAC
Online Public Access Catalog [Internet]
OPC
Open Process Control + Organic/Optical Photoconductor
OPCODE
Operational Code
OPD
Operand
OPI
Open Prepress Interface
OPM
Operations Per Minute
OPS
Open Profiling Standard + Oracle Parallel Server [Oracle]
OPT
Open Protocol Technology
.OPT
Options (file name extension)
OPUS
Octal Program Updating System
OQL
Object Query Language
ORACLE
On-Line Inquiry and Report Generator (UNIX DB program)
ORB
Object Request Broker [Microsoft]
ORDVAC
* Ordnance Variable Automatic Computer
.ORG
Non-Profit Organizations (Domain name) [Internet]
ORI
Online Retrieval Interface
.ORI
Original (file name extension)
ORL
Optical Return Loss
OROM
Optical Read-Only Memory
ORS
Output Record Separator
OS
Operating System
OS/2
Operating System/2 [IBM]
OSA
Open Scripting/System Architecture
OSCAR
Open Source Cluster Application Resources
OSD
On Screen Display + Open Software Description/Distribution
OSE
Office Server Extensions [Microsoft]
OS/E
Operating System/Environment
OSF
Open Software Foundation
OSGI
(OSGi) Open Services Gateway Initiative
OSI
Open Systems Interconnection
OSINT
Open Source Intelligence
OSM
Off-Screen Model
OSP
On-Screen Programming + Optical Storage Processor
OSPF
Open Shortest Path First
OSQL
Object Structured Query Language
OSR2
OEM Service Release 2 [Microsoft]
OSS
Open Source Software
OT
Object Technology
OTA
Operation-Triggered Architecture + Over The Air
OTDR
Optical Time Domain Reflectometer
OTF
Open Token Foundation
OTI
Object Technology International [IBM]
OTP
One-Time Programmable
OUI
Organizational Unique Identifier
OURS
Open Users Recommended Solutions
.OUT
Outlines (file name extension)
OUTS
Output String
OV
Overflow
OVAL
Object-Based Virtual Application Language [Psion] + Open Vulnerability Assessment Language [US-CERT]
.OVL
Program Overlay (file name extension)
.OVR
Program Overlay (file name extension)
OWA
Outlook Web Access [Microsoft]
OWL
Object/Open Windows Library [Borland]
P
P3P
Platform for Privacy Preferences Project
PAB
Personal Address Book
PABX
Private Automatic Branch Exchange
PACE
Priority Access Control Enabled [3Com]
PACS
Picture Archiving and Communication System
PACS-L
Public Access Computer Systems List [Internet]
PAD
Packet Assembler/Disassembler + Portable Application Description
PADS
Pen Application Development System [Slate Corporation]
PAIH
Public-Access Internet Host [Internet]
PAIS
Public-Access Internet Site [Internet]
.PAK
Packed (compressed file name extension) [NoGate Consulting]
PAL
Paradox Applications Language [Borland] + Phase Alternating Line + Portable Audio Laboratory + Programmed Array Logic + Programming Assembly Language Programming Assembly Language
.PAL
Palette (file name extension)
PALC
Plasma-Addressed Liquid Crystal (display)
PALS
Principles of the Alphabet Literacy System
PAM
Pluggable Authentication Module (library) + Pulse Amplitude Modulation
PAN
Personal Area Network [GTE]
PAP
Packet-level Procedure + Password Authentication Protocol + Picture And Picture + Push Access Protocol + Printer Access Protocol
PAR
Personal Animation Recorder + Parallel
PARA
Paragraph
PARC
Palo Alto Research Center [XEROX]
PA-RISC
Precision Architecture-RISC [HP]
.PAS
PASCAL source code (file name extension)
PASCAL
(Programming Language named for Blaise Pascal)
PAT
Port Address Translation
.PAT
Patch + Pattern (file name extensions)
PATA
Parallel Advanced Technology Attachment
PATN
Promotional Port Access Telephone Number
PAUSE
Perl Automatic Upload Server
PAX
Portable Archive Exchange [Unix]
PB
Petabyte (1,024 terabytes) (One Million Billion characters of information)
PBA
Printed Board Assembly
PBC
Plain-Text Block Chaining
PBE
Prompt By Example
PBGA
Plastic Ball Grid Array
PBP
Picture-By-Picture
PBR
Policy-Based Routing [Cisco]
PBT
Provider Backbone Transport
PBX
Private Branch Exchange
PC
Personal Computer + Printed Circuit + Program Counter
PCACIAS
Personal Computer Automated Calibration Interval Analysis System
PCB
Printed Circuit Board + Program Control Block
PCBC
Plain/Propagating Cipher Block Chaining
PCC
Proof Carrying Code
PCD
Photo Compact Disk
PC-DOS
Personal Computer - Disk Operating System [IBM]
PCEB
PCI to EISA Bridge [Intel]
PCI
Peripheral Component Interconnect/Interface
PCIC
PC-Card Interrupt Controller
PCIE
PCI Express (slot)
PC-I/O
Program Controlled I/O
PCL
Printer Command Language [HP] + Process Control Language
PCM
Personal Computer Manufacturer + Printer Cartridge Metric [HP] + Pulse Code Modulation
PCMA
Paired Carrier Multiple Access
PCMC
PCI, Cache, Memory Controller [Intel]
PCMCIA
Personal Computer Memory Card International Association
PCMIM
Personal Computer Media Interface Module
PCN
Personal Computer Network
PCNFS
Personal Computer Network File System
PCO
Point of Control and Observation
PCS
Patchable Control Store + Personal Communication Services/System + Personal Conferencing Specification + Planning Control Sheet + Print Contrast Signal + Process Control Systems + Program Counter Store + Project Control System
PCT
Private Communications Technology + Program Control Table
.PCT
Picture (file name extension)
.PCX
PC Paintbrush/Picture Image (file name extensions)
PD
Phase-Change Dual + Public Domain
PDA
Personal Digital Assistant
.PDB
Palm Database (file name extension) + Program Database (file name extension)
PDC
Primary Domain Controller
PDD
Physical Device Driver + Portable Digital Document
PDF
Package Definition File + Portable Document Format + Portable Document File + Processor Defined Function + Program Development Facility
.PDF
Printer Description (file name extension)[Borland,Lotus]
PDH
Plesiosynchronous Digital Hierarchy
PDIAL
Public Dialup Internet Access List [Internet]
PDL
Page Description Language + Program Description Language + Program Design Language
PDM
Product Data Management
PDN
Public Data Network
PDO
Portable Distributed Objects [Next]
PDP
Parallel Data Processing + Plasma Display Panel + Programmable Data Processor + (DEC Computer System Designation, i.e. PDP-8, PDP-11)
PDS
Packet Driver Specification + Partitioned Data Set + Planetary Data System + Portable Document Software + Processor Direct Slot [Macintosh]
PDSN
Packet Data Serving Node
PDSS
Post Development and Software Support
PDT
Performance Diagnostic Tool [IBM] + Programmable Drive Table
PDU
Plug Distribution Unit + Protocol Data Unit
.PDX
Paradox files (file name extension) [Borland] + Printer Description Extension (file name extension)
PE
Parity Even + Processing Element + Protect Enable
PEA
Pocket Ethernet Adapter
PEB
Personal Electronic Ballot
P4EE
Pentium 4 Extreme Edition [Intel]
PEL
Picture Element [IBM]
PEM
Privacy-Enhanced Mail [Internet]
PEN SDK
Pen Computing Software Development Kit
PEP
Packet Exchange Protocol + Packetized Ensemble Protocol [Telebit]
PERC
Power Edge RAID Controller
PERL
Practical Extraction and Report Language [Unix]
PERT
Program Evaluation and Review Technique
PES
Positioning Error Signal + Processor Enhancement Socket Processor Upgrade Socket
PET
Print Enhancement Technology [Compaq]
.PFB
Printer Font Binary (file name extension)
PFE
Programmer's File Editor
.PFM
Printer Font Metrics (file name extension) [Windows]
PFN
Page Frame Number
PFR
Portable Font Resource + Power-Fail Restart
PGA
Pin Grid Array + Professional Graphics Adapter [IBM]
PGC
Program Group Control [Microsoft]
PGDN
Page Down
.PGL
Graphics (file name extension) [Hewlett-Packard]
PGM
Program
PGML
Precision Graphics Markup Language
PGP
Pretty Good Privacy (name of encryption program)
.PGP
ProGram Parameter (file name extension) [AutoCAD]
PGUP
Page Up
PHF
Perfect Hash Function
PHIGS
Programmers' Hierarchical Interactive Graphics Standards
.PHO
Phone List (file name extension)
PHP
Personal Home Pages (original name of this programming language, now known as PHP Hypertext Preprocessor)
PHS
Personal Handyphone System
PI
Program Interruption
PIA
Peripheral Interface Adapter
PIC
Personal Information Carrier + Personal Intelligent Communicator + Personal Internet Communicator + Platform for Internet Content + Priority Interrupt Controller + Program Interrupt Controller
PICS
Platform for Internet Content Selection [W3C]
PICT
Picture
PID
Packet Identifier + Physical Interface Device + Process Identification Number + Product ID + Proportional, Integral, Derivative
PIER
Procedures for Internet/Enterprise Renumbering
PIF
Picture Interchange Format File + Program Information File
PII
Program Integrated Information
PILOT
Programmed Inquiry Learning Or Teaching
PilotACE
* Pilot Automatic Computing Engine
PIM
Personal Information Manager + Primary Interface Module + Protocol-Independent Multicast
PIN
Personal Identification Number + Process Identification Number [Unix]
PINE
Pine Is Not Elm (original usage) + Program for Internet News & Email (present usage)
PING
Packet Internet Groper
PIO
Parallel Input/Output + Processor Input/Output + Programmed Input/Output
PIP
Pattern and Information Processing + Personal Identity Provider + Personal Information Portal + Picture-In-Picture + Problem Isolation Procedure + Programmable Interconnect Point
PIPO
Parallel In, Parallel Out
PIR
Protocol Independent Routing
PIT
Programmable Interval Timer
PIXEL
Picture Element
PJPEG
Progressive JPEG
PK
Pack + Primary Key
PKC
Public Key Cryptography
PKE
Public Key Enabled
PKI
Public Key Infrastructure
PL
Plus
.PL
Perl Language (file name extension)
PLA
Programmable Logic-Array
PLATO
Programmed Logic for Automatic Teaching Operations
PLC
Power Line Communications + Programmable Logic Controller
PLCC
Plastic Leadless Chip Carrier
PLD
Programmable Logic Device
PLDS
Pilot Land Data System [NASA]
PLL
Phase Locked Loop
.PLL
Prelinked Library (file name extension) [Clipper]
PL/M
Programming Language for Micros
PLMN
Public Land Mobile Network
PLS
Primary Link Station
PLSQL
Procedural Language-Extensions to SQL (Oracle)
PLU
Primary Logical Unit
PLV
Production Level Video
PL/1
* Programming Language One
PM
Presentation Manager [IBM] + Preventative Maintenance + Process Manager
.PM6
PagerMaker6 (file name extension) [Corel]
P-MAIL
Paper Mail
PMD
Packet Mode Data
PMMU
Paged Memory Management Unit
PMOS
Positive Channel Metal Oxide Semiconductor
PMP
Personal Media Player + Portable Multimedia Player
PMR
Problem Management Report [IBM]
PMU
Performance Monitoring Unit
PMS
Policy Management System
PN
Processing Node
P/N:
Part Number
PNA
Programmable Network Access
PND
Position Navigation Device
PNG
Portable Network Graphics
PNNI
Private Network-to-Network Interface
PNP
Plug And Play + Positive Negative Positive (bipolar transistor)
PNP-X
Plug And Play Extensions
PO
Parity Odd
POA
Portable Object Adapter
POC
Point Of Contact
POC-IT
Point Of Care-Information Technology [Johns Hopkins]
POD
Piece Of Data + Plain Old Documentation [Perl] + Plain Old Dos + Publishing On Demand
POE
Power Open Environment
POH
Power-On Hours
POI
Point Of Interest
POL
Problem Oriented Language
POP
Picture-Outside-Picture + Point Of Presence + Pop from Stack + Post Office Protocol
POP3
Post Office Protocol, Version 3
POPA
Pop All Registers
POPF
Pop Flags
POR
Power-On-Reset
POS
Packet Over Sonet + Point of Sale + Positive + Programmable Object Select
POSE
Palm Operating System Emulator
POSIX
Portable Operating System Interface for Unix
POST
Power-On Self Test
POSTNET
Postal Numeric Encoding Technique (bar code)
POTS
Plain Old Telephone Service + Plain Old Time-Sharing
POWER
Performance Optimization with Enhanced RISC [IBM]
PowerPC
Performance Optimization with Enhanced RISC-Performance Computing
PP
Parallel Port
P2P
Peer To Peer + People To People
P3P
Platform for Privacy Preferences
PPA
Pixel Processing Accelerator
.PPD
PostScript Printer Description (file name extension)
PPDS
Personal Printer Data Stream [IBM]
PPGA
Plastic Pin Grid Array
PPI
Precise Pixel Interpolation
PPM
Pages Per Minute
PPML
Personalized Print Markup Language
PPP
Point-to-Point Protocol [Internet]
PPPOE
(PPPoE) Point-to-Point Protocol Over Ethernet
PPS
Packets Per Second + Power Personal Systems [IBM]
.PPS
PowerPoint Show (file name extension) [Microsoft]
PPTP
Point-to-Point Tunneling Protocol [Microsoft]
PPU
Place of Primary Use
PQA
Palm Query Application
PQFP
Plastic Quad Flat Pack
PQO
Parallel Query Option
PRACSA
Public Remote Access Computer Standards Association
PRAM
Parallel Random-Access Machine + Parameter Random Access Memory
.PRC
Pilot Resource (file name extension) [Palm Pilot]
.PRD
Printer Driver (file name extension) [Microsoft]
PRE
Preformatted [HTML]
PREP
Power PC Reference Platform [IBM/Motorola]
PRF
Pulse Repetition Frequency
.PRF
Preferences (file name extension) [Grammatik IV]
.PRG
Program (file name extension)
PRI
Primary-Rate Interface
PRINTF
Print with Formatting [C Programming Language]
PRISM
Photo-Refractive Information Storage Material
.PRJ
Project (file name extension) [Borland]
PRMD
Private Management Domain [X.400]
PRML
Partial-Response Maximum-Likelihood
.PRO
Professionals (Domain Name) [Internet] + Profile (file name extension)
PROC
Procedure
PROFS
Professional Office System [IBM]
PROG
Program + Programmer
PROLOG
Programming In Logic (Programming Language)(See HLL)
PROM
Programmable Read Only Memory
PRN
Printer
PRNG
Pseudo-Random Number Generation (algorithm)
.PRS
Printer (file name extension) [WordPerfect]
PRTSC
Print Screen
PS
Proportional Spacing
.PS
PostScript (file name extension)
PS/2
Programming System 2 [IBM]
PSAPI
Presentation Space Application Programming Interface
PSC
Personal Super Computer + Print Server Command + Product Service Center
PSDN
Packet-Switched Data Network
PSDS
Packet-Switched Data Service
PSERVER
Print Server [NetWare]
PSF
Permanent Swap File
PSID
PostScript Image Data
PSINET
(formerly Performance Systems International)
PSK
Phase Shift Keying
PSM
Platform Specific Model + Printing Systems Manager + Print Services Facility [IBM]
PSN
Packet Switching Network + Processor Serial Number
PSP
Personal Software Products (group) [IBM] + Play Station Portable [Sony] + Program Segment Prefix
PSPDN
Packet-Switched Public Data Network
PSRAM
Pseudo-Static Random Access Memory
PSRT
PostScript Round Table [GEnie]
PSS
Process Status Structure
PSTN
Public Switched Telephone Network
PSU
Power Supply Unit
PSW
Program Status Word
.ps.Z
Compressed PostScript (file name extension) [Unix]
PT
Page Table
P/T
Part Time
PTD
Parallel Transfer Disk Drive
PTE
Page Table Entry
PTF
Problem Temporary/Trouble Fix [IBM]
PTH
Plated Through Hole
PTI
Packet Type Identifier
PTT
Postal Telephone & Telegraph + Push To Talk
PUB
Public (directory) [Internet] + Publish
.PUB
Publication (file name extension) [Ventura]
PUN
Physical Unit Number
PUP
PARC Universal Packet (protocol) + Potentially Unwanted Program
PURL
Persistent URL
PUS
Processor Upgrade Socket
PUSHA
Push All Registers
PUSHF
Push Flags
PVC
Permanent Virtual Circuit + Polyvinyl Chloride
PVM
Parallel Virtual Machine + Pass-through Virtual Machine (protocol) [IBM]
PVP
Parallel Vector Processing
PVR
Personal Video Recorder
PVS
Parallel Visualization Server
PVT
Position, Velocity, Time
PW
Password
PWB
Printed Wire Board + Programmer's Workbench [Microsoft]
PWD
Print Working Directory [Unix]
.PWL
Password List (file name extension)
PWM
Pulse Width Modulation
PWR
Power
PWSCS
Programmable Workstation Communication Services [IBM]
.PX
Primary Index (file name extension) [Paradox]
Q
QA
Quality Assurance
QAM
Quadrature Amplitude Modulation
QBE
Query By Example
QBF
Query by Form
QBIC
Query By Image Content [IBM]
QBITS
Quantum Bits
QC
Quality Control
QD
Querty/Dvorak
QDA
Qualitative Data Analysis
QDOS
Quick and Dirty Operating System
.QDI
Quicken Dictionary (file name extension) [Intuit]
.QDT
Quicken Data (file name extension) [Intuit]
QEMM
Quarterdeck Expanded Memory Manager [Quarterdeck Corp.]
QFA
Quick File Access
QFE
Quick-Fix Engineering [Microsoft]
QFP
Quad Flat Pack
QIC
Quality Information Using Cycle Time [Hewlett-Packard] + Quarter-Inch Cartridge
.QIF
Quicken Import File/Interchange Format (file name extension)
QLLC
Qualified Logical Link Control
.QMT
Quicken Memorized List (file name extension) [Intuit]
.QNX
Quicken Indexes to Data (file name extension) [Intuit]
QOS
Quality Of Service
QPG
Quantum Phase Gate
QPSK
Quadrature Phase Shift Keying
QSAM
Queued Sequential Access Method
QTC
Quicktime Conferencing [Macintosh]
QTVR
Quicktime Virtual Reality
QVGA
Quarter Video Graphics Array
QWAVE
Quality Windows Audio/Video Experience [Microsoft]
R
RA
Remote Assistance + Return Authorization
.RA
Real Audio (file name extension)
RACF
Resource Access Control Facility
RAD
Rapid Application Development
RADAR
Radio Detection And Ranging + Rights, Availabilities, Distribution Analysis and Reporting [Disney]
RADB
Routing Arbiter Data Base
RADIUS
Remote Authentication Dial-In User Service
RADSL
Rate Adaptive Digital Subscriber Line
RAG
Row Address Generator
RAID
Redundant Arrays of Independent Disks + Redundant Arrays of Independent Drives + Redundant Arrays of Inexpensive Disks
RAIS
Redundant Arrays of Inexpensive Systems
RALU
Register Arithmetic Logic Unit
RAM
Random Access Memory
.RAM
Real Audio Metafile (file name extension)
RAMDAC
Random Access Memory Digital-to-Analog Converter [Sierra]
RAMP
Remote Access Maintenance Protocol [Internet]
RAN
Radio Access Network + Regional Advanced Network
RAND
Random
RAP
Rapid Application Prototyping
RARP
Reverse Address Resolution Protocol
RAS
Random Access Storage + Reader Admission System [British Library] + Reliability, Availability and Serviceability + Remote Access Service + Row Address Select
RASAPI
Remote Access Service Application Programming Interface [Microsoft]
.RAT
Rating (file name extension)
RAVE
Rendering Acceleration Virtual Engine [Apple Computer]
.RAW
Raw Data (file name extension)
RB
Right Button (of 2 or 3 button Mouse)
RBBS
Remote Bulletin Board System
RBCS
Remote Bar Code System
RBOC
Regional Bell Operating Company
.RC
Resource (file name extension)
RC1
Release Candidate 1 [Microsoft]
RCD
Redistribution Control Descriptor
RCL
Rotate Carry Left
RCP
Remote Control Panel + Remote Copy [Internet] + Restore Cursor Position + Rich Client Platform
RCPT
Recipient
RCR
Rotate Carry Right
RCS
Records Communications Switching System + Revision Control System [Unix]
RD
Receive Data + Remove Directory
R&D
Research and Development
RDA
Remote Database Access
RDB
Receive Data Buffer + Relational Database
RDBMS
Relational Database Management System
RDCLK
Received Timing Clock
RDF
Resource Description Framework [W3C]
RDIF
Radio Frequency Indentification (tag)
RDN
Relative Distinguished Name
RDO
Remote Data Object
RDP
Reliable Datagram Protocol + Remote Desktop Protocol
RDR
Remote Data Recovery
RDRAM
Rambus DRAM
RDSL
Rate-Adaptive DSL
RDSR
Receiver Data Service Request
RDTO
Receive Data Transfer Offset [IBM]
RDX
Realistic Display Mixer
.REC
Recorder (file name extension) + Recreational or Entertainment Activities (Domain Name) [Internet]
REC.
Recreation [USENET Newsgroup Category]
.REF
Reference (file name extension)
REG
Register
REGAL
Rigid Epoxy Glass Acrylic Laminate
REGEDIT
Registry Editor [Microsoft]
RELSECT
Relative Sector
REM
Remark + Remote + Ring Error Monitor
REN
Rename + Ringer Equivalence Number
REP
Repeat
REPE
Repeat while Equal
REPNE
Repeat while Not Equal
REPNZ
Repeat while Not Zero
REPZ
Repeat while Zero
REQ
Request
REREG
Re-Register
RES
Remote Execution Service + Reset + Resolution
.RES
Resource (file name extension)
RET
Resolution Enhancement Technology [HP] + Return
RETR
Retrieve
REX
Relocatable Executable
REXEC
Remote Execution
REXX
Restructured Extended Executor (language) [IBM]
RF
Radio Frequency
RFC
Request For Comments [Internet]
RFD
Reduced Function Device + Request for Discussion [Internet]
RFI
Radio Frequency Interference + Request for Information
RFID
Radio Frequency Identification
RFP
Request for Proposal
RFQ
Request for Quotation
RFS
Remote File Sharing + Remote File System
RFT
Reliable File Transfer + Revisable Form Text + Rich Text Format
RFU
Reserved For Future Use
RGB
Red-Green-Blue (color model)
RI
Referential Integrity + Ring Indicate
RID
Relative Identifier
RIFF
Resource Interchange File Format [Microsoft]
RIM
Remote Installation and Maintenance [Microsoft] + Research In Motion (company) + Ring Indicator Monitor
RIME
RelayNet International Message Exchange
RIP
Raster Image Processor + Remote Imaging Protocol + Routing Information Protocol [Novell]
RIPEM
Riordan's Internet Privacy Enhanced Mail
RIPS
Raster Image Processing System
RISC
Reduced Instruction Set Computing
RIT
Raw Input Thread [Microsoft]
RJE
Remote Job Entry
RLD
Received Line Detect
RLE
Run Length Encoded
RLL
Run Length Limited
RLN
Remote LAN Node [DCA]
RLOGIN
Remote Login
RLSD
Received Line Signal Detected
RLSI
* Ridiculously Large-Scale Integration
RM
Reset Mode
RMA
Return Material Authorization + Return to Manufacturer Authorization
RMB
Right Mouse Button
RMC
Raptor Management Console [Symantec]
RMDIR
Remove Directory
RMI
Remote Messaging Interface + Remote Method Invocation [Sun]
RMON
Remote Monitor/Monitoring
RMP
Remote Maintenance Processor [IBM]
RMS
Record Management Services + Root Mean Square
RMW
Read-Modify-Write
RN
Read News [Internet]
RNA
Remote Network Access [Microsoft]
RNC
Radio Network Controller
RND
Random
RNG
Random Number Generator
RNP
Regional Network Provider
R-O
Read Only
ROB
Reorder Buffer [Intel]
ROI
Return On Investment
ROL
Rotate Left
ROLAP
Relational On-Line Analytical Processing
ROM
Read Only Memory
ROOM
Real-Time Object-Oriented Modeling
ROP
Raster Operation + RISC Operation
ROPES
Rapid Object-Oriented Process for Embedded Systems
ROR
Rotate Right
ROS
Read-Only Storage [IBM]
ROSCOE
Remote Operating System Conversational Online Environment
ROT
Running Object Table
RPC
Remote Procedure Call
RPE
Remote Program Execution
RPG
Report Program Generator (Programming Language)
RPL
Resident Programming Language + Requested Privilege Level
RPM
Revolutions Per Minute
RPN
Real Page Number + Reverse Polish Notation
RPRINTER
Remote Printer [NetWare]
RPPROM
Reprogrammable PROM
RPR
Relative Performance Rating
RPT
Repeat
RPQ
Request for Price Quotation
RQBE
Relational Query By Example [Fox Pro]
RR
Real Reality
RRP
Recommended Retail Price
RS
Radio Shack + Recommended Standard (as in RS-232) [EIA] + Record Separator + Request to Send
RSA
Rural Service Area
RSA129
(129 digit cryptographic security number named after its inventors: Drs. Ronald L. Rivest, Adi Shamir and Leonard M. Adleman)
RSAC
Recreational Software Advisory Council
RSCS
Remote Spooling Communications System
RSD
Route Server Daemon
RSH
Remote Shell
RSI
Repetitive Strain Injury (Carpal Tunnel Syndrome)
RSL
Request-and-Status Link
RSP
Required Space Character + Response
RSPX
Remote Sequenced Packet Exchange
RSS
Really Simple Syndication + Reduced Space Symbology + RDF Site Summary + Rich Site Summary
RSSI
Received Signal Strength Indicator
RST
Reset + Restart
RSTS
Resource Sharing Time Sharing [Digital]
RSVP
Resource Reservation Protocol
RSX
Realistic Sound Experience + Real Time Resource Sharing Executive
RT
Real Time + RISC Technology + Run Time
R/T
Receive/Transmit
RTAM
Remote Terminal Access Method
RTC
Real-Time Clock
RTCP
Real-Time Control Protocol
RTDM
Real-Time Data Migration
RTEL
Reverse Telnet [Internet]
RTF
Rich Text Format
RTI
Run Time Infrastructure
RTL
Raster Transfer Language + Register Transfer Language/Level + Resistor Transistor Logic + Right-To-Left + Run Time Library
RTM
Release To Manufacturer + Response Time Monitor + Runtime Manager [Borland]
RTMP
Routing Table Maintenance Protocol
RTN
Reuters Transaction Network
RTOS
Real-Time Operating System
RTP
Rapid Transport Protocol + Real Time Protocol + Real-Time Transport Protocol
RTS
Remote Takeover System + Ready/Request To Send
RTSP
Real-Time Streaming Protocol
RTTI
Runtime Type Identification/Information
RTTY
Radio Teletypewriter (Communications)
RTV
Real Time Video
RTX
Run Time Extension
RUN
Rewind/Unload [IBM]
RUP
Rational Unified Process [IBM]
RVA
Relative Virtual Address
RVI
Reverse Interrupt
R/W
Read/Write
RWIN
Receive Window
RWM
Read-Write Memory
RX
Receiver
RXD
Receive Data
S
SA
Selective Availability
SAA
Systems Application Architecture [IBM]
SAAS
Software As A Service
SABRE
Semi-Automatic Business Research Environment
SAC
Single Attachment Concentrator
SACD
Super Audio Compact Disk
SACL
System Access Control List
SADL
Synchronous Data Link Control [Racal-Vadic]
SAINT
* Symbolic Automatic Integrator
SAL
Shift Arithmetic Left + Spatial Aggregation Language + Systen Abstraction Layer
SALT
Speech Application Language Tags
SAM
Serial Access Memory + Sequential Access Method + Security Accounts Manager [Microsoft] + Single Application Mode [Microsoft]
SAMI
Synchronized Accessible Media Interchange
SAML
Security Assertion Markup Language
SAN
Storage/System Area Network
SANE
Standard Apple Numeric Environment
SAP
Second Audio Program + Service Access Point [DEC] + Session Announcement Protocol + Service Advertising Protocol + * Symbolic Assembly Program + Systems, Applications and Products (company) [SAP]
SAPI
Speech Application Program Interface [Microsoft]
SAR
Segmentation and Reassembly + Shift Arithmetic Right + Specific Absorption Rate Successive Approximation Register + Synthetic Aperature Radar
SARG
Search Argument
SARS
Severe Acute Respiratory Syndrome (virus)
SAS
Sales Accounting System + Serial Attached SCSI + Single Attached Station + Single Audio System + Statistical Analysis System
SASI
Shugart Associates System Interface (SCSI originated from SASI)
SATA
Serial Advanced Technology Attachment
SATAN
Security Administrator Tool for Analyzing Networks
.SAV
Saved (file name extension)
SAVDM
Single Application VDM
SAX
Simple API for XML
SB
Sound Blaster [Creative Labs] + Sound Board
SBA
Scene Balance Algorithms [Kodak] + Service Based Architecture
SBAS
Satellite Based Augmentation System
SBB
Subtract With Borrow
SBC
Single-Board Computer
SBCS
Single-Byte Character Set
SBI
Sound Blaster Instrument
.SBR
Source Browser (file name extension) [Borland]
SBS
Small Business Server + Smart Battery Specification [Duracell/Intel]
.SC
Script (file name extension)
SCA
Scalable Computing Architecture [HP] + Service Component Architecture
SCADA
Supervisory Control and Data Acquisition
SCAM
SCSI Configuration Automatically
SCAS
Scan String
SCB
Subsystem Control Block [IBM]
SCC
Serial Communications Controllers + Serial Controller Chip + Synchronous Channel Check [IBM]
SCCP
Simple Conference Control Protocol
SCCS
Source Code Control System
SCD
Standard Color Display
S-CDMA
Synchronous Code-Division Multiple Access
SCF
System Control Facility
SCI
Scalable Coherent Interface + Serial Communications Interface
SCI.
Science [USENET Newsgroup Category]
SCIL
Serial Control Interface Logic
SCLM
Software Configuration and Library Management [IBM]
SCM
Service Control Manager + ScreenCam Format [Lotus] + Software Configuration Management + Station Class Mark + Supply Chain Management
SCO
Santa Cruz Operation (Software Company) + Synchronous Connection-Oriented (link)
SCOPE
Simple Communications Programming Environment [Hayes]
SCP
Save Cursor Position + Subsystem Control Port + System Control Program
SCR
Silicon Controlled Rectifier
.SCR
Script (file name extension)
SCRAM
Software Configuration, Release and Management
SCRAMJET
Supersonic Combustion Ramjet (engine)
SCRN
Screen (video display)
SCRS
Scalable Cluster of RISC Systems
SCSA
Signal Computing System Architecture [Dialogic]
SCSI
Small Computer Systems Interface
SCTP
Stream Control Transmission Protocol
SD
Send Data + Secure Digital + Super Density
SDA
Software Delivery Agent [IBM] + Software Disk Array + Source Data Automation + System Display Architecture [Digital]
SDAM
Single DOS Application Mode
SDB
Symbolic Debugger [Unix]
SDD
Software Description Database [Internet] + Subscriber Data Document + System Distribution Directory
SDF
Space Delimited File + Space Delimited Format
.SDF
Standard Data Format (file name extension)
SDH
Synchronous Digital Hierarchy
SDI
Selective Dissemination of Information + Single Document Interface + Software Development Interface [Mosaic]
SDIO
Secure Digital Input/Output
SDK
Software Development Kit [Microsoft]
SDL
Specification and Description Language
SDLC
Synchronous Data Link Control (protocol)
SDLT
Super Digital Linear Tape
SDM
System Development Multitasking
SDMI
Secure Digital Music Initiative/Interface
SDMMC
Secure Digital Multi Media Card
SDMS
SCSI Device Management System [NCR]
SDN
Software Defined Network [AT&T]
SDNS
Secure Data Network Service
SDO
Service Data Objects + Software Delivery Optimization [Borland]
SDR
Streaming Data Request
SDRAM
Synchronous DRAM
SD-ROM
Super Density ROM
SDS
Sysops Distribution System
SDSL
Single-Line DSL + Symmetric DSL
SDSM
Super Digital Sound Management
SD_STB
Streaming Data Strobe [IBM]
SDTV
Standard Definition Television
SDV
Segment Delay Value + Switched Digital Video [AT&T]
SDX
Storage Data Acceleration
SDXF
Structured Data Exchange Format
SEA
Standard Extended Attribute [OS/2]
.SEA
Self Extracting Archive (file name extension) [Macintosh]
SEAC
* Name of first computer to use transistors, built by (National Bureau of) Standards Eastern Automatic Calculator (Also see SWAC)
SEAL
Segmentation and Reassembly Layer (protocol) + Screening External Access Link [Digital-DEC]
SEC
Single Error Correction
SECAM
Sequentiel Couleur Avec Memoire (Sequential Color With Memory)
SECC
Single Edge Contact Cartridge
SED
Stream Editor + Stream-Oriented Editor
SEG
Segment
SEH
Structured Exception Handling
SEL
Select
SEM
Scanning Electron Microscope + Standard Electronic Module + Strategic Enterprise Management [SAP]
SEO
Search Engine Optimization
SEPP
Secure Encryption Payment Protocol
SER
Serial
SERCOS
Serial Real-Time Communications System
SERPS
Search Engine Results Page [Google]
SET
Secure Electronic Transaction + Softwave Engineering Technology
.SET
Driver Set (file name extension) [Lotus 1-2-3] [LDC] + Image Settings (file name extension) [Paradox]
SETEXT
Structure Enhanced Text [Internet]
SEU
Single Event Upset + Smallest Executable Unit
SF
Sign Flag
SFC
System File Checker
SFD
Start Frame Delimiter
SFDR
Spurious-Free Dynamic Range
SFI
Software Fault Isolation
SFN
Short File Name
SFQL
Structured Full-text Query Language
SFS
System File Server
SFT
System Fault Tolerance
SFX
Self Extracting + Sound Effect(s)
SGA
Shared Global Area
SGCP
Simple Gateway Control Protocol
SGEN
Signal Generator + System Generator
SGDT
Store Global Descriptor Table
SGI
Silicon Graphics, Inc.
SGM
Shaded Graphics Modeling
SGML
Standard/Structured Generalized Markup Language
SGR
Set Graphics Rendition
SGRAM
Synchronous Graphics RAM
S/H
Sample and Hold
SHA
Secure Hash Algorithm [NSA]
SHED
Segmented Hypergraphic Editor
SHG
Segmented Hypergraphics
SHL
Shift Logical Left
SHOE
Simple HTML Ontology Extension
SHR
Shift Logical Right
SHTML
Server-Side Include HyperText Markup Language
S-HTTP
Secure Hypertext Transfer Protocol
SHV
Standard High-Volume
.SHW
Show (file name extension)
SI
Shift-In + Source Index + System Information + System Integration
SIC
Standard Industrial Code
SID
Security Identifier + Serial Input Data + Station Identification [AT&T] + Symbolic Interactive Debugger + System ID
SIDF
System Independent Data Format
SIDH
System Identification for Home Systems
SIDT
Store Interrupt Descriptor Table
SIF
Standard Input Format
SIFT
Stanford Information Filtering Tool
SIG
Special Interest Group
SIGCAT
Special Interest Group on CD-ROM Applications and Technology
SIM
Simulator + Subscriber Identity Module
SIMCARD
Subscriber Identity Module Card
SIMD
Single Instruction, Multiple Data-stream (processor)
SIMM
Single In-line Memory Module
SIMTEL
Simulation and Teleprocessing
SIMULA
Simulation (language)
SIO
Serial Input/Output (communications driver)
SIP
Session Initiation Protocol + Single In-line Package
SIPC
Simply Interactive Personal Computer [Microsoft]
SIPO
Serial In, Parallel Out
SIPP
Single In-line Pin Package
SIR
Serial Infrared [Hewlett-Packard]
SIRDS
Single-Image Random Dot Stereogram
SIS
Single-Image Stereogram
SISL
System Interrupt Steering Logic
SISNET
Signal In Space Through The Internet
SI/SO
Serial In/Serial Out + Shift In/Shift Out
SIT
Special Information Tones
.SIT
Stuff-It (compressed file name extension) [Macintosh]
SIU
System Interface Unit
SIV
System Integrity Verifier
SKIP
Simple Key-Management for Internet Protocols [Sun]
SKU#
Stock Keeping Unit Number
SLA
Service Level Agreement
SLB
Static Load Balancing
SLC
Subscriber Line Concentrator
SLD
Second-Level Domain (name)
SLDT
Store Local Descriptor Table
SLED
Single Large Expensive Disk
SLI
Session Level Interface
SLIC
System Level Integration Circuit + System Licensed Internal Code [IBM]
SLIM
Structured Language for Internet Markup
SLIP
Serial Line Interface Protocol
SLM
Spatial Light Modulator
SLMR
Silly Little Mail Reader
SLOSH
Sea, Lake and Overland Surge from Hurricane (program)
SLOT
Scanned Laser Output Terminal
SLP
Service Location Protocol + Super Long Play
SLR
Single Lens Reflex
SLSI
Super Large-Scale Integration
SLSS
Systems Library Subscription Service [IBM]
SLU
Secondary Logical Unit + Spoken Language Understanding
SM
Set Mode + Shared Memory
SMA
Software Migration Assistant [IBM]
SMART
Self-Monitoring Analysis and Reporting Technology
SMB
Server Message Block (protocol)
SMD
Surface Mounted Device
SMDR
Station Message Detail Recording
SMDS
Switched Multimedia/Multi-Megabit Data Service
SME
Small & Medium Sized Enterprises
SMF
Single Mode Fiber + System Manager Facility [Compaq]
SMI
System Management Interrupt [Intel]
SMIF
Standard Mechanical Interface
SMIL
Synchronized Multimedia Integration Language
S-MIME
Secure MIME
SMIT
System Management Interface Tool [IBM]
SMK
Software Migration Kit [Microsoft]
SML
Standard Meta Language
SMM
System Management Mode [Intel]
SMOBC
Solder Mask Over Bare Copper
SMP
Simple Management Protocol + Symbolic Manipulation Program + Symmetrical Multi-Processing + Symmetric Multiprocessor
.SMP
Sample (file name extension)
SMPC
Shared Memory Parallel Computer
SMPS
Switching Mode Power Supply
SMRAM
System Management Random Access Memory
SMS
Short Message Service [Sprint] + Short Messaging System + Storage Management Services [NetWare] + Storage Management Subsystem/System + Systems Management Server [Microsoft]
SMSW
Store Machine Status Word
SMT
Station Management (protocol) + Surface-Mount Technology
SMTP
Simple Mail Transfer Protocol
SMU
System Management Utility
SN
Serial Number
S/N
Signal-to-Noise (Ratio)
SNA
Systems Network Architecture [IBM]
SNAP
Sub-Network Access Protocol + Sub-Network Attachment Point
SNAPI
Structured N-Dimensional Application Program Interface [Oracle]
SND
Sound
SNEWS
Secure News Server [Internet]
SNMP
Simple Network Management Protocol
SNOBOL
String Oriented Symbolic Language (Programming Language)
SNP
Serial Number/Password [Omen Technology]
SNR
Signal-to-Noise Ratio
SNRM
Set Normal Response Mode
SOA
Service-Oriented Architecture + Start Of Authority
SOAP
Simple Object Access Protocol
SOC
System On a Chip
SOC.
Social Issues [USENET Newsgroup Category]
SOCKS
Socket Secure (server) [Internet]
SO-DIMM
Small Outline DIMM
SOE
Standard Operating Environment
SOH
Start of Header
SOHO
Small Office/Home Office
SOI
Silicon-On-Insulator [IBM]
SOIC
Small Outline Integrated Circuit
SOJ
Small-Outline J-Lead
SOL
Simulation Oriented Language
SOM
Start of Message + System Object Model [IBM]
SONAR
Sound Navigation and Ranging
SONET
Synchronous Optical Network
SOP
Small Outline Package + Standard Operating Procedures
SOS
Silicon On Sapphire + Sophisticated Operating System + Standards and Open Systems
SOTA
State Of The Art
SOX
Sound Exchange
SP
Service Pack [IBM] + Stack Pointer + System Product
SPA
Secure Password Authentication [Microsoft] + Software Publishers Association
SPAN
Space Physics Analysis Network
SPAP
Shiva Password Authentification Protocol
SPARC
Scalable Processor Architecture + Sun's Palo Alto Research Center
SPC
Small Peripheral Controller + Statistical Process Control
SPCL
Spectrum Cellular Corporation
SPCS
Stored Program Controlled Switch
SPD
Serial Presence Detect
SPE
Synergistic Processing Element
SPEC
Systems Performance Evaluation Cooperative
SPF
Sender Policy Framework + Shortest Path First + System Programming Facility
SPGA
Staggered Pin-Grid Array
SPI
Security Parameters Index + Service Provider Interface + SCSI Parallel Interface + Stateful Packet Inspection
.SPI
Spool (file name extension)
SPID
Service Profile/Provider Identifier
SPIKE
Science Planning Intelligent Knowledge-Based Environment [STScI]
SPIRES
Stanford Public Information Retrieval System [Stanford University]
SPKI
Simple Public Key Infrastructure
SPL
Software Product Line + Spooler + Structured Product Labeling [Microsoft] + System Programming Language [HP]
.SPL
Spell Checker (file name extension)
SPLD
Simple Programmable Logic Device
SPM
System Performance Monitor [IBM]
SPOOL
Simultaneous Peripheral Operations On Line
SPOT
Shared Product Object Tree [IBM] + Small Programmable Object Technology [Sun] + Smart Personal Object Technology [Microsoft]
SPP
Sequenced Packet Protocol + Standard Printer Port
SPPS
Scalable Power Parallel System [IBM]
SPR
Special Purpose Register + Statistical Pattern Recognition + Symmetrical Phase Recording
SPREAD
* Systems Programming, Research, Engineering and Development [IBM]
SPS
Secure Packet Shield + Shock Protection System + Standby Power System
SPSS
Statistical Package for the Social Sciences
SPT
Sectors Per Track
SPVA
Super Patterned Vertical Alignment
SPX
Sequenced Packet Exchange [Novell]
SQ
Squeezed (files)
SQE
Signal Quality Error (test)
SQL/DS
Structured Query Language/Data System [IBM]
SQOS
Secure Quality Of Service
SQRT
Square Root
SR
Shift Register
SRAM
Shadow Random Access Memory + Static Random Access Memory
SRAPI
Speech Recognition API
SRB
Source-Route Bridge
SRC
System Resource Controller
.SRC
Source (file name extension)
SRD
Screen Reader System
SRDRAM
Self-Refreshed DRAM
SRGB
Sustained RGB (values)
SRGS
Speech Recognition Grammar Specification [W3C]
SRM
Security Reference Monitor
SRO
Sharable and Read Only
SRP
Suggested Retail Price
.SRP
Script (file name extension)
SRPI
Server-Requester Programming Interface
SRQ
Service Request
SRR
Serially Reusable Resource
SRS
Sound Retrieval System
SS
Stack Segment + Single Sided + Seconds
SS7
Signaling System 7 [Bellcore]
SSA
Serial Storage Architecture
SSAD
Structured System Analysis and Design
SSAP
Source Service Access Point
SSCP
Systems Service Control Point [IBM]
SSD
Solid State Disk
SSEC
* Selective Sequence Electronic Calculator [IBM]
SSGA
System Support Gate Array
SSH
Secure Shell (protocol)
SSI
Server Side Includes + Single System Image + Small Scale Integration
SSL
Secure Socket Layer
SSMA
Spread Spectrum Multiple Access
SSML
Speech Synthesis Markup Language [W3C]
SSO
Single Sign On
SSPI
Security Service Provider Interface [Microsoft]
SSR
Secure Socket Relay
SSRP
Simple Server Redundancy Protocol [Cisco]
SST
Spread-Spectrum Technology + Systems Services and Technology
STA
Spanning Tree Algorithm
STAR
Self Defining Text Archival
STAX
(StAX) Streaming API for XML
STB
Strobe
STC
Set Carry Flag
STD
Set Direction Flag + Standard
STDA
StreetTalk Directory Assistance [Banyan]
STDAUX
Standard Auxilary
STDERR
Standard Error
STDIN
Standard Input
STDIO.H
Standard Input/Output Header [C Programming Language]
STDM
Statistical Time Division Multiplexer
STDOUT
Standard Output
STDPRN
Standard Printer
STEM
Science, Technology, Engineering and Math
STEP
Standard for Exchange of Product
STEREO
Solar-Terrestrial Relations Observatory [JHUAPL]
.STF
Structured File (file name extension) [Lotus Agenda]
STI
Set Interrupt Flag
S/TK
Sectors Per Track
STL
Standard Template Library
STM
Scanning Tunneling Microscope
STN
Super-Twist Nematic
.STORE
Businesses Offering Goods (Domain Name) [Internet]
STOS
Store String
STP
Secure Transfer Protocol + Shielded Twisted Pair (cable) + Signal Transfer Point + Synchronized Transaction Processing
STR
Store Task Register + Synchronous Transmitter Receiver
STRESS
Structural Engineering System Solver (Programming Language)
STRUDL
Structural Design Language (Programming Language)
STScI
Space Telescope Science Institute
STT
Secure Transaction Technology [Microsoft]
STX
Start of Text
.STY
Style (file name extension) [Ventura, Word, WordPerfect]
SUB
Subroutine + Substitute + Subtract
SUN
Sun Microsystems, Inc.
.SUP
Supplemental Dictionary (file name extension) [WordPerfect]
SUPERDARN
Super Dual Auroral Radar Network [JHUAPL]
SVC
Switched Virtual Circuit
SVCD
Super Video Compact Disk
SVF
Simple Vector Format
SVG
Scalable Vector Graphics
SVGA
Super Video Graphics Array
S-VHS
Super VHS
S-VIDEO
Separate Video
SVM
System Virtual Machine [Microsoft] + System Volume Mangement
SVN
Switched Virtual Network [IBM]
SVR
Server
SVR#
System V Release Number [AT&T]
SVTC
Secure Videoteleconference
S/W
Software
SWAC
* Mobile version of SEAC, built for deployment to White Sands, and named Standards Western Automatic Calculator
SWAIS
Simple Wide Area Information Server [Internet]
SWAP
Shared Wireless Access Protocol
SWIG
Simplified Wrapper and Interface Generator
SWISH
Simple Web Indexing System for Humans
SWP
Simple Web Printing
.SWP
Swap (file name extension)
SXGA
Super Extended Graphics Array
SXRD
Silicon Crystal Reflective Display
.SYL
Syllabus (file name extension)
SYLK
Symbolic Link
.SYM
Symbols (file name extension)
SYMPL
Systems Programming Language
.SYN
Synonym (file name extension)
SYNC
Synchronous
SYS
System
.SYS
System Configuration (file name extension) + System Device Driver (file name extension)
SYSADMIN
System Administrator
SYSGEN
System Generator
SYSLOG
System Log
SYSMOD
System Modification
SYSOP
System Operator
SYSREQ
System Request
SZ
Send ZModem [Unix]
T
TAB
Tape Automated Bonding
TAC
Title, Author, Copyright
TACS
Total Access Communication System
TAD
Telephone Answering Device
TAG
Technical Advisory Group
TAI
International Atomic Time
TAL
Typed Assembly Language
TALOSS
Three-Dimensional Advanced Localization Observation Submarine Software
TAO
Track At Once
TAP
Telelocator Alphanumeric Protocol
TAPCIS
The Access Program for the CompuServe Information Service
TAPI
Telephony Applications Programming Interface
.tar
Tape Archive (archived file name extension) [Unix]
.tar.Z
Compressed Archived files (file name extension) [Unix]
TAS
Telephone Access Server + Total Access System
TASM
Turbo Assembler [Borland]
TAXI
Transparent Asynchronous Transceiver/Receiver Interface
TB
Terabyte (1,024 gigabytes) (One Thousand Billion characters of information)
T/B
Top and Bottom
TBBS
The Bread Board System (BBS)
TBGA
Tape Ball Grid Array
.TBK
Toolbook (file name extension)
TBS
Time-Based Sampling
TBU
Tape Backup Unit
TC
Test Control + Transmission Control
TCL
Tool Command Language
TCM
Trellis-Coded Modulation
TCO
Total Cost of Ownership
TCP
Tape-Carrier Package
TCPA
Trusted Computing Platform Alliance [Intel]
TCP/IP
Transmission Control Protocol/Internet Protocol
TCT
Terminal Control Table
TD
Transmit Data
.TDA
To Do Archive (file name extension) [Palm]
TDC
Tabular Data Control
TDD
Telecommunications Device for the Deaf + Test Driven Development
TDtoDP
Tablet Coordinates to Display Coordinates (converting)
TDE
Terminal Display Editor
.TDF
Trace Definition File (file name extension) [OS/2] + Typeface Definition File (file name extension)
TDI
Transport Device Interface
TDM
Technical Document Management + Time Division Multiplexing
TDMA
Time Division Multiple Access
TDMS
Terminal Display Management System
TDP
Tag Distribution Protocol [Cisco] + Telelocator Data Protocol + Thermal Design Power
TDSR
Transmitter Data Service Request
TDR
Time Domain Reflectometry
TE/2
Terminal Emulator/2 [Oberon]
TEB
Thread Environment Block
TEC
Tokyo Electronics Corporation
TED
Technology, Entertainment and Design + Tiny Editor + Transient Electromagnetic Device
TEI
Terminal Endpoint Identifier
TELCO
Telephone Company
TEML
Turbo Editor Macro Language [Borland]
TEMP
Temporary
TER
Thermal Eclipse Reading [Sony]
TERMPWR
Terminator Power
TFDD
Text File Device Driver
TFEL
Thin-Film Electroluminescent
.TFM
Tagged Font Metric (file name extension)
TFT
Thin-Film Transistor (screens)
TFTP
Trivial File Transfer Protocol
.TGA
Taga Bitmap (file name extension)
THD
Total Harmonic Distortion
.THD
Thread (file name extension)
THINNET
Thin Ethernet
THOMAS
The (U.S.) House (of Representatives) Open Multimedia Access System
THOR
Tandy High-Performance Optical Recording
THR
Transmit Holding Register
.THS
Thesaurus (file name extension)
TI
Texas Instruments, Inc.
TIA
Telecommunications Industry Association + The Internet Adapter [Internet]
TIB
Tag Information Base
TID
Target ID + Task Identification
TIES
Time Independent Escape Sequence
.TIF
Tagged Image File (filename extension)
TIFF
Tagged Image File Format
TIGA
Texas Instruments Graphics Architecture
TIGER
Topologically Integrated Geographic Encoding and Referencing
TIIAP
Telecommunications and Information Infrastructure Assistance Program [NII]
TIL
Tech Info Library [Macintosh]
TIM
Technical Information Memo [Compaq]
TIMED
Thermosphere-Ionosphere-Mesosphere Energetics and Dynamics [JHUAPL]
TIMI
Technology Independent Machine Interface [IBM]
TIMS
Text Information Management Systems
TINA
Telecommunication Information Networking Architecture
TIP
Terminal Interface Processor + Transaction Internet Protocol
TITOFET
Tunneling-In, Tunneling-Out Field Effect Transistor
TKIP
Temporal Key Integrity Protocol
TK/TK
Track to Track
TLA
Three-Letter Acronym
TLB
Translation Lookaside Buffer
.TLB
Table (file name extension)
TLD
Top Level Domain
TLI
Transport Layer Interface
TLS
Transport Layer Security
TLU
Table Lookup
.TLX
Telex (file name extension)
TM
Trademark
TMDS
Transition Minimized Differential Signaling
.TML
Template (file name extension)
TMP
Temporary
TMS
Traffic Management System [BA]
TN
Twisted Nematic
TNC
Terminal Node Controller
TNEF
Transport Neutral Encapsulation Format
TNO
The Netherlands Organization
TOAD
Tool for Application Developers
TOC
Table Of Contents
TOD
Time Of Day
TOF
Tiny Open Firmware
TOP
Technical and Office Protocol
TOS
Terms Of Service
TPC
Transaction-Processing Performance Council
TPF
Transactions Processing Facility [IBM]
TPI
Tracks Per Inch
TPL
Table Producing Language + Transaction Processing Language
TPM
Transactions Per Minute + Trusted Platform Module
TPORT
Twisted Pair Port Transceiver [AT&T]
TP-PMD
Twisted Pair-Physical Medium Dependent (cable)
TPS
Transactions Per Second + Transaction Processing System
TPW
Turbo Pascal for Windows
TQFP
Thin Quad Flat Pack
TQM
Total Quality Management
TR
Terminal Ready
T/R
Transmit/Receive
TRACERT
Trace Route [Microsoft]
TRADIC
* Transistorized Airborne Digital Computer (Name of first computer to be entirely transistorized)
.TRM
Terminal (file name extension)
TRN
Threaded Read News [Internet] + Token Ring Network
TRON
The Real-Time Operating System Nucleus
TS
Top Secret
TSA
Target Service Agent + Technical Support Alliance + Telephony Services Architecture
TSAPI
Telephony Services Application Program Interface [AT&T + Novell]
TSB
Termination Status Block
TSD
Type-Specific Driver
TSE
The Semware Editor
TSID
Transmitting Subscriber Identification [Microsoft]
TSN
Transition Sequence Number
TSO
Time Sharing Option
TSOP
Thin Small-Outline Package
TSP
Telephony Service Provider
TSR
Terminate and Stay Resident
TSS
Task State Segment + Time Sharing System
TS/SI
Top Secret/Sensitive Information
.TST
Test (file name extension)
TSTN
Triple Supertwisted Nematic
TSV
Tab Separated Values
TT
Typewriter Text
TTA
Transport-Triggered Architecture
TTCN
Tree and Tabular Combined Notation
.TTF
TrueType Font (file name extension)
TTL
Through The Lens + Transistor-Transistor Logic
TTP
Thermal-Transfer Printing
TTS
Text-To-Speech + Transaction Tracking System
TTY
Teletype
TUCOWS
The Ultimate Collection of Winsock Software
TUI
Text-Based User Interface [WordPerfect]
TUMS
Table Update and Management System [Stanford University]
.TUT
Tutorial (file name extension)
TVF
Table of contents Verbosely from File [UNIX]
TVFS
Toronto Virtual File System [IBM]
TVI
Television Interference
TVOL
Television On-Line
TWAIN
Technology Without Any Interesting Name (connection between application and scanner software)
TWEAKUI
Tweak User Interface
TWIP
Twenty In Point (as in 20 twips/pixel) [Microsoft]
TWX
Teletypewriter Exchange Service
TXD
Transmit Data
.TXF
Tax Exchange Format (file name extension)
TXT
Text
TXT2STF
Text To Structured File [Lotus Agenda]
TZ
Time Zone [Unix]
U
UA
User Agent + User Area
UAE
Unrecoverable Application Error
UAM
User Authentication Method
UART
Universal Asynchronous Receiver/Transmitter
UAS
User Application Software
UBE
Unsolicited Bulk Email
UBR
Unspecified Bit Rate
.UC2
Compressed File (file name extension) [UltraCompressor]
UCB
Universal Content Broker
UCBE
Unsolicited Commercial Bulk Email
UCC
Uniform Commercial Code
UCE
Unsolicited Commercial Email
UCL
Universal Communications Language
UCS
Unicode Conversion Support + Universal Character Set + User Coordinate System
UCT
Universal Coordinated Time
UDA
Universal Data Access [Microsoft]
UDB
Universal Data Base
UDC
Universal Decimal Classification + User Defined Commands
UDD
User Data Document
UDDI
Universal Description, Discovery and Integration
UD-DVD
Ultra-Definition Digital Video Disk
UDE
Universal Data Exchange
UDEC
* Universal Digital Electronic Computer [Burroughs]
UDF
Universal Disk Format + User Defined Functions
UDG
User Defined Gateway
UDMA
Ultra Direct Memory Access
UDP
User Datagram Protocol
UDT
Uniform Data Transfer + User-Defined Type
UEMS
Unsolicited Electronic Mail Solicitation
UFS
Universal\Unix File System
UG
User Group
UHCI
Universal Host Controller Interface
UHF
Ultra-High Frequency
UHL
Universal Hypertext Link
UI
Unix International + User Interface
UIC
User Identification Code
UID
User Identifier
UIMA
Unstructured Information Management Architecture [IBM]
UIMS
User Interface Management System
UL
Underwriters Laboratories + Unordered List + Upload
ULA
Uncommitted Logic Array
ULB
Ultra Wideband
ULN
Universal Link Negotiation
ULS
Universal Licensing System
ULSI
Ultra Large Scale Integration
UMA
Unified Memory Architecture
UMB
Upper Memory Block [LIM/AST]
UMD
Universal Media Disk
UML
Unified Modeling Language
UMPC
Ultra-Mobile Personal Computer
UMS
User Mode Scheduler
UMTS
Universal Mobile Telecommunications System
UNC
Universal Naming Convention + Uuencoded Netnews Collator [Unix]
UNCOL
Universal Computed Oriented Language
UNEP
Unbundled Network Platform
UNI
User-Network Interface
UNICOM
Universal Integrated Communication (System)
UNICOS
Universal Compiler FORTRAN compatible
UNII
Unlicensed National Information Infrastructure
UNIVAC
Universal Automatic Computer
UNIX
(AT&T Bell Laboratories Operating System)
UNMA
Unified Network Management Architecture
UNSPSC
Universal Standard Products and Services Classification
UP
Uniprocessor
UPC
Universal Product/Program Code + User Parameter Control
UPG
Upgrade
UPL
User Program Language
UPM
Unix Programmer's Manual + User Profile Management [IBM]
UPNP
(UPnP) Universal Plug and Play
UPS
United Parcel Service (company) + Uninterruptible Power Supply/System
URC
Uniform Resource Characteristics + Uniform Resource Citation
UREP
Unix RSCS Emulation Protocol (protocol)
URI
Uniform Resource Identifier
URL
Uniform Resource Locator
URN
Uniform Resource Name/Number
US
Unit Separator
USART
Universal Synchronous-Asynchronous Receiver/Transmitter
USB
Universal Serial Bus [Intel]
US-CERT
United States Computer Emergency Readiness Team
USENET
User's Network [Internet]
USERID
User Identification
USOC
Universal Service Ordering Code
USQ
Unsqueezed (files)
USR
US Robotics (corporation)
USRT
Universal Synchronous Receiver/Transmitter
USSA
User Supported Software Association (United Kingdom)
UT
User Terminal
UT1
Universal Time One
UTC
Coordinated Universal Time
UTF
Unicode Transformation Format
UTI
Universal Text Interchange/Interface
UTM
Unified Threat Management + Universal Transverse Mercator (grid)
UTP
Unshielded Twisted-Pair (cable)
UU
Uuencode/Uudecode
UUCP
Unix-To-Unix Copy Protocol
UUD
UUDecoding [Unix]
UUDECODE
Unix-To-Unix Decoding
UUE
UUEncoding [Unix]
UUENCODE
Unix-To-Unix Encoding
UUI
User-To-User Information [AT&T]
UUID
Universal Unique Identifier
UV
Ultraviolet
UWB
Ultra-Wide Band
UWR
Ultra Wideband Radio
UXGA
Ultra Extended Graphics Array
V
VA
Virtual Address + Visual Age [IBM]
VAD
Value Added Dealer
VADD
Value Added Disk Driver
VADSL
Very-High-Rate Asymmetric DSL
VAI
Video As Input
VAL
Value + Voice Application Language
.VAL
Validity Checks (file name extension) [Paradox]
VAM
Virtual Access Method
VAN
Value Added Network
VAP
Value Added Process
VAR
Value Added Reseller + Value Added Retailer + Variable
VAST
Variable Array Storage Technology
VAX/VMS
Virtual Address Extension/Virtual Memory System [DEC]
VB
Variable Block + Visual Basic [Microsoft]
VBA
Visual Basic for Applications [Microsoft]
VBE/AI
Vesa Bios Extension/Audio Interface
VBI
Vertical Blanking Interval
VBNS
Very High Speed Backbone Network Service [MCI + NSF]
VBR
Variable Bit Rate
VBRUN
Visual Basic Runtime
VBS
Visual Basic Script
.VBX
Visual Basic Extension (file name extension)
VCC
Virtual Channel Connection
VCD
Video Compact Disk + Virtual Communications Driver
VCI
Virtual Circuit Identifier
VCL
Visual Class/Component Library
VCM
Virtual Channel Memory
VCN
Virtual Cluster Number
VCOS
Visual Caching Operating System [AT&T]
VCPI
Virtual Control Program Interface
VCR
Video Cassette Recorder
VDD
Virtual Device Driver
VDDM
Virtual Device Driver Manager
VDE
Video Display Editor + Visual Development Environment
VDI
Virtual Device Interface
VDISK
Virtual Disk
VDM
Virtual DOS Machine [IBM]
VDMAD
Virtual Direct Memory Access Device [Microsoft]
VDS
Virtual DMA Services
VDSL
Very-High-Bit-Rate DSL + Very-High-Data-Rate DSL
VDT
Video Dial Tone + Video Display Terminal
VDU
Video Display Unit + Visual Display Unit
VEGA
Video-7 Enhanced Graphics Adapter [Video-7, Inc.]
VEMM
Virtual Expanded Memory Manager
VEMMI
Versatile Multimedia Interface
VER
Verify + Version
VERONICA
Very Easy Rodent-Oriented Net-Wide Index to Computer Archives [Internet]
VERR
Verify Read Access
VERW
Verify Write Access
VES
Video Encoding Standard [Oracle] + Virtual Execution System
VESA
Video Electronics Standards Association
VF
Virtual Floppy
VFAT
Virtual File Allocation Table [Microsoft]
V.FC
Version.First Class (communications standard)
VFD
Vacuum Fluorescent Display
VFW
Video For Windows [Microsoft]
VGA
Video Graphics Array
VGC
Video Graphics Controller
VHDL
VHSIC Hardware Description Language
VHF
Very-High Frequency
VHS
Very High Speed + Video Home System + Virtual Host Storage
VHSIC
Very High Speed Integrated Circuit
VI
Visual Interactive (editor) [UNIX]
VIA
Virtual Interface Architecture [Intel]
VIE
Virtual Information Environment
VIF
Virtual Interface + Virtual Interrupt Flag
VIM
Vendor Independent Mail + Vendor Independent Messaging + Video Interface Module
VIN
Vehicle Identification Number
VINES
Virtual Networking System [Banyan]
VIO
Video Input/Output + Virtual Input/Output
ViP
Visual Programming [Lotus]
VIP
Variable Information Processing + Video Information Provider + Virtual Interrupt Pending + Visual Interactive Parser
VIPER
Verifiable Integrated Processor for Enhanced Reliability
VIS
Video Information System [Tandy] + Viewable Image Size + Visual Instruction Set [Sun] + Voice Information System
VJ HEADER
Van Jacobsen Header (compression) [Unix]
VLA
Variable-Length Array
VLAN
Virtual Local Area Network
VL-BUS
Vesa Local-Bus [VESA]
VLD
Variable-Length Decoder
VLF
Very Low Frequency
VLINK
Visited Link [HTML]
VLIW
Very Large Instruction Word
VLM
Virtual Loadable Module
VLSI
Very Large Scale Integration
VLSIPS
Very Large Scale Immobilized Polymer Synthesis
VLT
Variable List Table
VM
Virtual Machine + Virtual Memory
VMA
Virtual Memory Address
VMB
Virtual Machine Boot
VMD
Video Motion Detection
VME
Versa Module Eurocard + Virtual Memory Environment
VML
Vector Markup Language [Microsoft]
VMM
Virtual Machine/Memory Manager
VMOS
Vertical MOS
VMP
Virtual Modem Protocol
VMS
Virtual Machine Storage + Virtual Memory System + Voice Message System
VMT
Virtual Memory Technique
VNA
Virtual Network Architecture
VNC
Virtual Network Computing
VNOS
Visual Network Operating System
VOC
Creative Voice (format) [Sound Blaster]
VOD
Video On Demand
VOFDM
Vector Orthogonal Frequency Division Multiplexing [Cisco]
VOIP
Voice Over Internet Protocol
VOL
Volume
VOM
Volt-Ohm-Milliammeter
VOR
Visions Of Reality
VOS
Verbal/Virtual/Voice Operating System
VP
Virtual Path
VPD
Virtual Printer Device + Vital Product Data [IBM]
VPDN
Virtual Private Data Network
VPDS
Virtual Private Data Service [MCI]
VPE
Video Port Extensions [Microsoft] + Visual Programming Environment
VPL
Virtual Programming Language
VPLS
Virtual Private LAN Service
VPM
Video Port Manager
VPN
Virtual Page Number + Virtual Private Network
VPS
Voice Processing System
VPSC
Vault, Process, Structure, Configuration
VPT
Virtual Print Technology [Dataproducts]
VR
Virtual Reality + Voltage Regulated/Regulator
VRAM
Video Random Access Memory
VRD
Virtual Retinal Display + Virtual Reference Desk
VRE
Voltage Regulated Extended
VRM
Vendor Relationship Management + Voltage Regulator Module
VRML
Virtual Reality Modeling Language (originally named Virtual Reality Markup Language)
VROOMM
Virtual Real-time Object Oriented Memory Manager [Borland]
VRRP
Virtual Router Redundancy Protocol
.VRS
WordPerfect Graphics Driver (file name extension)
VRT
Voltage Regulation Technology [Intel]
VRU
Voice Response Unit
VS
Virtual Storage
VSAM
Video Surveillance and Monitoring + Virtual Storage Access Method
VSAT
Very Small Aperture Terminal
VSE
Virtual Storage Extended
VSF
Vertical Scanning Frequency
VSI
Virtual Socket/Switch Interface
VSIO
Virtual Serial Input Output
VSM
Virtual Shared Memory + Virtual Storage Management + Visual System Management [IBM]
VSN
Volume Serial Number
VSOS
Virtual Storage Operating System
VSS
Visual SourceSafe [Microsoft]
VST
Virtual Studio Technology
VSTO
Visual Studio Tools [Microsoft]
VSWR
Voltage Standing Wave Ratio
VSYNC
Vertical Sync
VT
Vertical Tab + Virtualization Technology [Intel]
VTAM
Virtual Telecommunications Access Method [IBM]
VTNS
Virtual Telecommunications Network Service
VTS
Volume Tracking Driver
VUI
Video User Interface
VUP
VAX Unit of Performance
VWB
Visual WorkBench [Microsoft]
VWM
Virtual Window Manager
VXA
Variable-Speed Architecture [Ecrix]
VxD
Virtual Extended Driver [Microsoft]
.VXD
Virtual Device (file name extension) [Microsoft]
VXML
Voice Extensible Markup Language
V&V
Verification and Validation
W
W/
With
W3
(see WWW)
W3A
World Wide Web Applets
W3C
World Wide Web Consortium
W4
What-Works-With-What
WAAS
Wide Area Augmentation System
WABI
Windows Application Binary Interface [SunSoft]
WAE
Wireless Application Environment
WAI
Web Accessibility Initiative + Web Application Interface [Netscape]
WAIS
Wide Area Information Server
WAITI
Wait-For-Interrupt
WAITS
Wide Area Information Transfer System
WAN
Wide Area Network
WAP
Wireless Application Protocol
WAR
Web Archive
WARP
Web Service Aggregtion, Rely and Propogation
WATS
Wide Area Telecommunications Service
.WAV
Waveform Audio (file name extension)
WBEM
Web-Based Enterprise Management
W/C
Watts Per Channel
WC
Word Count
W-CDMA
Wideband CDMA
WCG
Wide Color Gamut
WCS
World Coordinate System
WD-40
Water Displacement-40th Attempt
WDDM
Windows Display Driver Model [Microsoft]
WDDX
Web Distributed Data Exchange
WDL
Windows Driver Library [Microsoft]
WDM
Wavelength Division Multiplexing + Windows Driver Model [Microsoft]
WDRAM
Windows Dynamic Random Access Memory
WEA
Web Enabled Application
.WEB
Entities Emphasizing the WWW (Domain Name) [Internet]
WEBDAV
Web Based Distributed Authoring and Versioning
WEBNFS
Web Network File System [Sun]
WEFT
Web Embedding Fonts Tool [Microsoft]
WELL
Whole Earth 'Lectronic Link (BBS)
WEP
Wired Equivalent Privacy + Wireless Encription Protocol
WFM
Wired For Management [Intel]
WFQ
Weighted Fair Queuing [Cisco]
WFW
Windows For Workgroups [Microsoft]
WGS
Work Group System
WHAM
Waveform Hold and Modify [Microsoft]
WHC
Workstation Host Connection
WHQL
Windows Hardware Quality Labs [Microsoft]
WIDEN
Wideband Integrated Digital Enhancement Network
WIFI
(Wi-Fi) Wireless Fidelity
WIKI
Wikipedia (encylopedia)
WIM
Wireless Instant Messaging
WIMP
Windows, Icons, Menus and Pulldowns
WIN 9.X
Windows95/Windows98
WIN...CE
Windows Compact Edition [Microsoft]
WINDBG
Windows Debugger [Microsoft]
WINE
Windows Emulator
WINForum
Wireless Information Networks Forum
WIN...FS
Windows Future Storage [Microsoft]
WIN/MAC
Windows Macintosh
WIN...MCE
Windows Media Center Edition [Microsoft]
WIN...ME
Windows Millennium Edition [Microsoft]
WINS
Windows Internet Naming Service [Microsoft]
WIN...SE
Windows Second Edition [Microsoft]
WINSOCK
Windows Open Systems Architecture [Microsoft] + Windows Sockets
WINWORD
Word For Windows [Microsoft]
WIN...XP
Windows The "Experience" [Microsoft]
WISE
WordPerfect Information System Environment
WISP
Wireless Internet Service Provider
WIT
Web Interactive Talk [Internet]
.WKB
Workbook (file name extension) [WordPerfect]
.WKE
Worksheet (file name extension) [Lotus 1-2-3] [LDC]
.WKQ
Spreadsheet (file name extension) [BORQU]
.WKS
Worksheet (file name extension) [Lotus 1-2-3] [LDC]
.WKZ
Compressed Spreadsheet (file name extension) [BORQU]
.WK1
Worksheet (file name extension) [Lotus 1-2-3] [LDC]
WL
Word Line
WLAN
Wireless Local Area Network
.WLG
Dr. Watson Log (file name extension)
WLL
Wireless Local Loop
.WMA
Windows Media Audio (file name extension) [Microsoft]
WMC
Workflow Management Coalition
WME
Wireless Multimedia Enhancements
.WMF
Windows Metafile Format (file name extension) [Microsoft]
WMFSDK
Windows Media Format Software Development Kit [Microsoft]
WMI
Windows Management Instrumentation [Microsoft]
WML
Wireless Markup Language
WMP
Windows Media Player [Microsoft]
WMRM
Write Many, Read Many
WMT
Windows Media Technologies [Microsoft]
.WMV
Windows Video File (file name extension) [Microsoft]
WNIC
Wide-Area Network Interface Co-Processor
WNIM
Wide-Area Network Interface Module
W/O
Without
WORM
Write Once, Read Many
WOS
Workstation Operating System
WOSA
Windows Open Services/Systems Architecture [Microsoft]
WOW
Window On Windows [Microsoft] + World Of Warcraft
WP
WordPerfect + Word Processing + Write Protected
WPA
Wi-Fi/Wireless Protected Access
.WPD
Windows Printer Description (file name extension)
.WPG
WordPerfect Graphics (file name extension)
WPHD
Write-Protect Hard Disk
.WPK
Keyboard (file name extension) [WordPerfect]
WPM
Words Per Minute
.WPM
Macro (file name extension) [WordPerfect]
WPOS
Workplace Operating System
WPS
Windows Printing System [Microsoft] + Workplace Shell [OS2]
WPVM
Windows Parallel Virtual Machine
.WQ1
Spreadsheet (file name extension) [BORPQU]
.WQ!
Compressed Spreadsheet (file name extension) [BORPQU]
WRAM
Windows Random Access Memory
WRE
Weighted Random Early Detection [Cisco]
.WRI
Write (file name extension)
WRK
Windows Resource Kit [Microsoft]
WS
WordStar + Workstation
WSAPI
Web Site Application Program Interface [O'Reilly]
WSDL
Web Services Definition/Description Language [IBM/Microsoft]
WSE
Web Services Enhancement
WSH
Windows Scripting Host [Microsoft]
WSP
Wireless Session Protocol
WSUI
Web Services User Interface
WT
Write Through
WTA
Wireless Telephony Application
WTLS
Wireless Transport Layer Security
WTM
Wired For Management
WWIS
World Wide Information System [Internet]
WWW
World-Wide Web [Internet]
WXGA
Wide Extended Graphics Array
WYSBYGI
What You See Before You Get It
WYSIWYG
What You See Is What You Get
X
XA
Extended Architecture + Extended Attribute
XACML
Extensible Access Control Markup Language
XACT
Cross-Platform Audio Content Tool
XAPIA
X.400 Application Program Interface Association
X2B
Hexadecimal to Binary [REXX]
.XBM
X-Windows Bitmaps (file name extension) (black and white)
XBRL
Extensible Business Reporting Language
X2C
Hexadecimal to Character [REXX]
XCHG
Exchange
XCMD
External Command
XCOPY
Extended Copy
X2D
Hexadecimal to Decimal [REXX]
XDF
Extended Density Format [IBM]
XDR
Extended/External Data Representation
XFCN
External Function
XFDL
Extensible forms Description Language
XGA
Extended Graphics Array [IBM]
XHMD
X-Directed Horizontal Magnetic Dipole
XHTML
Extensible HyperText Markup Language
XID
Exchange Identifier
XIOS
Extended Input/Output System
.XLA
Add-In (file name extension) [Microsoft-Excel]
XLAT
Translate
XLF
Exceptional Fortran [IBM]
XLIFF
XML Localization Interchange File Format [IBM]
.XLK
Backup (file name extension) [Microsoft-Excel]
XLL
Extensible Link Language
XLM
Excel Macro Language [Microsoft]
.XLT
Template (file name extension) [Microsoft-Excel]
XMIT
Transmit
XML
Extensible Markup Language
XMM
Extended Memory Manager [LIM/AST]
XMS
Extended Memory Specification [LIM/AST]
XNS
Xerox Network System (protocol) [Xerox]
XOFF
Transmitter Off
XON
Transmitter On
XOR
Exclusive OR (Also EOR)
XP
Extreme Performance [Compaq]
XPATH
XML Path Language
XPCOM
Cross Platform Component Object Model [Mozilla]
XPE
XP Embedded (see WIN...XP) [Microsoft]
.XPM
X-Windows Pixelmaps (file name extension) (color)
XPRM
Xerox Print Resources Manager [Xerox]
XPS
XML Paper Specification (file format)
XRI
Extensible Resource Identifier
XRNS
Extensible Resource Name System
XRT
Extensions for Real-Time
XSL
Extensible Stylesheet Language
XSLT
Extensible Stylesheet Language Transformation
XSMD
Extended Storage Module Drive (interface)
XSSI
Extended Server Side Includes
XTAL
Crystal
XTCLK
External Transmit Clock
XUL
Extensible User-Interface Language [Netscape]
Y
YAM
Yet Another Modem [Omen Technology]
YAHOO
Yet Another Hierarchically Officious Oracle [Internet]
Y2K
Year 2000
(Y/N)?
(Asks for a YES or NO decision)
YTD
Year To Date
Z
.z
Packed file (file name extension - using Pack/Unpack program)..lower case z..[Unix]
.Z
Compressed file (file name extension - using Compress/Uncompress program)..upper case Z..[Unix]
ZAK
Zero Administration Kit [Microsoft]
ZAW
Zero Administration for Windows [Microsoft]
ZBR
Zone-Bit Recording [IBM]
Z-CAV
Zoned Constant Angular Velocity
ZDL
Zero Delay Lockout
ZDS
Zenith Data Systems
ZIF
Zero-Insertion Force (socket)
ZIP
Zigzag In-Line Package + Zone Improvement Plan (ZIPcode)
.ZIP
Compressed File (file name extension) [PKWare]
.ZOO
Compressed File (file name extension) [Dhesi]
ZPV
Zoomed Port Video [Toshiba]
ZSL
Zero Slot LAN
ZVP
Zoomed Video Port
MISC
@
Arobas + At + Commercial At
(\)
Backslash
(/)
Slash
(~)
Tilde
(_)
Underscore
{ }
Braces
[ ]
Square Brackets
...
Ellipsis
*
Wildcard character (asterisk)
*.*
Star-Dot-Star (represents any file name. any file name extension)
.$$$
Temporary File (file name extension)
1GL
First Generation Language (machine language)
24/7
Twenty-Four Hours a Day, Seven Days a Week
286
80286 (microprocessor)
2GL
Second Generation Language (assembly language)
386
80386 (microprocessor)
3COM
3 Com Corporation (The 3 Coms are Computer, Communications and Compatibility)
3GL
Third Generation Language (programming language)
486
80486 (microprocessor)
4GL
Fourth Generation Language (descriptive language)
6DOF
Six Degrees Of Freedom