Computer Related abbreviated words at a glance
A
AA Auto Answer
AAB All-to-All
Broadcast
AAL Asynchronous
Transfer Mode Adaption Layer
AAP Applications
Access Point [DEC]
AAS All-to-All
Scatter
AASP ASCII
Asynchronous Support Package
AAT Average
Access Time
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
ABR Available
Bit Rate
ABRS Automated Book Request System [British
Library]
ABS Absolute
ABT Abort
ABTS ASCII Block
Terminal Services
AC Autocheck +
Automatic Computer + Alternating Current
ACC Accumulator
ACD Automated
Call Distribution +
Automatic Call Distributor
ACDI Asynchronous
Communications Device Interface
ACE 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
ACM Association for Computing Machinery
Audio
Compression Manager [Microsoft]
ACMS Application
Control Management System
ACP Ancillary
Control Program +
Auxillary
Control Process
ACROSS Automated
Cargo Release and Operations
Service
System
ACS Access +
Access Control Set +
Access
Control System +
Asynchronous
Communication Server
ACTS Automated
Computer Time Service
ACTT Advanced
Communication and Timekeeping
Technology [Seiko]
ACU Automatic
Calling Unit
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
ADD Automatic
Document Detection [WordPerfect]
ADF Automatic
Document Feeder +
Automatically Defined Function
.ADF Adapter
Description File (file name extension)
ADI AutoCad
Device Interface (driver)
ADL Address Data
Latch
ADLAT Adaptive
Lattice Filter
ADLC Adaptive
Lossless Data Compression [IBM] +
Asynchronous
Data Link Control
ADMACS Apple Document Mangagement And Conrol System
ADMD
Administrative Management Domain [X.400]
.ADN Add In
Utility (file name extension)
[Lotus
1-2-3] [LDC]
ADP 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
ADSL Asymmetrical Digital Subscriber Line
ADSR Attack,
Decay, Sustain, Release
ADT Application
Data Types
ADU Automatic
Dialing Unit
AE Above or
Equal
AEB Analog
Expansion Bus [Dialogic]
AF Auxiliary
carry Flag
AFA Accelerated
File Access
AFC Automatic
Font Change + Automatic Frequency Control
AFD Automatic
File Distribution
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 Appletalk
Filing Protocol [Macintosh]
AFS Andrew File
System (protocols)
AFTP Anonymous
File Transfer Protocol
AGC Automatic
Gain Control
AGRAS
Antiglare-Antireflective-Antistatic
AGU
Address-Generation Unit
AI Analog Input
+ Artificial Intelligence
AIA Applications
Integration Architecture [DEC]
AIC AIXwindows
Interface Composer [IBM]
AIF Audio Interchange Format
AIIM Association
for Information and Image Management
AIN Advanced
Intelligent Network [Bell Atlantic]
AIS Automated
Identification System [NCIC]
AISB Association
of Imaging Service Bureaus
AISP Association
of Information Systems Professionals
AIX Advanced
Interactive Executive [IBM]
ALC Arithmetic
and Logic Circuits +
Automatic
Level Control
ALE Address
Latch Enable
ALGOL Algorithmic
Oriented Language (see IAL)
ALIBI Adaptive Location of Internetworked Bases
of
Information
ALINK Active Link
[HTML]
ALIWEB Archie Like
Indexing in the Web [Internet]
ALN Asynchronous
Learning Network
ALR Advanced
Logic Research, Inc.
ALT Alternate
(mode)
ALT. Alternate
lifestyle [USENET Newsgroup Category]
ALU Arithmetic
Logic Unit
AMANDDA Automated
Messaging and Directory Assistance
AMD Active
Matrix Display +
Advanced
Micro Devices, Inc.
AMI American
Megatrends, Inc.
AMMA Advanced
Memory Management Architecture
[Everex
Systems]
AMPS Advanced
Mobile Phone Service
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
AO Analog
Output
AOCE Apple Open
Collaboration Environment
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
API Application
Program Interface
APIC Advanced Programmable Interrupt Controller
(bus) [Intel]
APIS Advanced
Passenger Information System
APL A
Programming Language (Mathematics)
APM Advanced
Power Management [IBM OS2]
.APP Application
(file name extension) [R:Base]
APPC Advanced
Program-to-Program Communications [IBM]
APPI Advanced
Peer-to-Peer Internetworking
APPN Advanced
Peer-to-Peer Networking [IBM]
APPS Applications
APRP Adaptive
Pattern Recognition Processing
APS 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 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
ARTA Apple Real
Time Architecture
ARTIC A Real-Time
Interface Copressor [IBM]
ARTS Asynchronous
Remote Takeover Server
ARTT Asynchronous
Remote Takeover Terminal
ARQ Automatic
Repeat Request
ARU Audio
Response Unit
AS Autonomous
System [Internet]
ASAP As Soon As
Possible +
Automatic Switching And Processing
AS3AP ANSI SQL
Standard Scalable and Portable
.ASC ASCII text
(file name extension)
ASCII American
Standard Code for Information Interchange
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
ASP Association
of Shareware Professionals
ASPI Advanced
SCSI Programming Interface [Adaptec]
ASPS Advanced
Signal Processing System
ASR Address
Space Register + Automatic Send-Receive +
Automatic Speech Recognition
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
AT Advanced
Technology + Attention
ATA Advanced
Technology Attachment
ATDP Attention
Dial Pulse
ATDT Attention
Dial Tone
ATE Automated
Test Equipment
ATG Advanced
Technology Group
ATH Attention
Hang-Up (Modem command)
ATM Adobe
Typeface Manager +
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)
ATZ Attention
Restore configuration profile from
nonvolatile
RAM (Modem command)
.AU Audio (file
name extension)
AUDIT Automated
Data Input Terminal
AUI Attachment
Unit Interface
AUP Acceptable
Use Policy [Internet]
AUTO Automatic
AUTOEXEC Automatic
Execution
AUX Auxiliary +
(First Serial Port)
AV Audio/Video
+ Audiovisual + Authenticity Verification
AVA Audio Visual
Authoring [IBM]
AVC Audio Visual
Connection [IBM]
AVG Average
AVI Audio Visual
Interleave [Microsoft]
AVR Automatic
Voice Recognition
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]
AX Architecture
Extended + Automatic Transmission
B
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
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)
BBS Bulletin
Board System
BCC Block Check
Character
BCC: Blind Carbon Copy
BCD Binary Coded
Decimal
B-CHANNEL Bearer Channel
BCL Batch
Command Language
BCN Beacon
BCP Best Current
Practice + Bulk Copy Program
BCPL Basic
Computer Programming Language
BCR Byte Count
Register
BCS Bar Code
Sorter
BDA Bios Data
Area
BDE Borland
Database Engine [Borland]
BDOS Basic Disk
Operating System
BDR Bus Device
Request
BE Below or
Equal
BECN Backward
Explicit Congestion Notification
BEDO Burst Extended
Data Out
BEL Bell
BELLCORE Bell
Communications Research
BERT Bit Error
Rate Test/Tester
BF Bad Flag
B/F
Background/Foreground
BFF Binary File
Format [IBM]
BFT Binary File
Transfer
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
BI Binary Input
.BIB Bibliography
(file name extension)
BiDi
Bi-Directional
BIM Beginning of
Information Marker
.BIN Binary (file
name extension)
BINAC * Binary
Automatic Computer
BIND Berkeley
Internet Name Domain
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
BIX Byte
Information Exchange (BBS)
BIZ. Business
[USENET Newsgroup Category]
.BK! Backup (file
name extension) [WordPerfect]
.B~K Backup (file
name extension)
BKSP Backspace
BL Backlit +
Bit Line
BLAST Blocked
Asynchronous Transmission (protocol)
[Communications Research Group]
.BLD BASIC Bload
Graphics (file name extension)
BLE Branch if
Less or Equal
BLER Block Error
BLK Block
BLMC Buried Logic Macrocell
BLOB Binary Large
Object
BLOS Branch if
Lower Or Same
BMI Branch if
Minus
BMIC BusMaster
Interface Controller [Intel]
BMP Basic
Mapping Support + Batch Message Processing Program
.BMP Bitmap
Picture (file name extension)
BNC Bayonet
Neill-Concelman (connector used with
coaxial
cable invented by Mr. Neill-Concelman)
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
BoB Break-out
Box
BOC Basic
Operator Console
BOF Beginning Of
File
BOM 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
BP Base Pointer
BPB BIOS
Parameter Block
BPDU Bridge
Protocol Data Unit
BPI Bits Per
Inch
BPL Branch if
Plus
BPS Bits Per
Second + Bytes Per Second
BR Bad Register
BRGC Binary
Reflected Gray Code
BRI Basic Rate
Interface + Brain Response Interface
BS Backspace
BSAM Basic
Sequential Access Method
BSC 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
BSR Bit Scan
Reverse
BSS Block
Started by Symbol
BSV BASIC Bsave
Graphics (file name extension)
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
BTOA Binary To
ASCII
BTP Batch
Transfer Program
BTR Bit Test and
Reset
BTS Bit Test and
Set
BU Branch Unit
BUBL Bulletin
Board for Libraries [Janet]
BUF Buffer
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
Collision Avoidance
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
CAEX Computer
Aided Exploration
CAG Column
Address Generator
CAI Computer
Aided Instruction
CAL Calendar +
Computer Aided Learning
CAM Common
Access Method + Computer Aided Manufacturing +
Contents
Addressable Memory
CAN Cancel
CAP Carrierless
Amplitude and Phase-Modulation +
Central
Arbitration Point +
Communication Application Platform +
Computer
Aided Publishing
.CAP Capture
(file name extension)
CAPD Computing To
Assist Persons With Disabilities [Johns
Hopkins
University]
CAPS Capitals
(Upper Case Letters) +
Cassette
Programming System
CARL Colorado
Alliance of Research Libraries [Internet]
CAS Column
Address Select +
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
Aided Testing + Computer Aided Tomography +
Computer
Aided Transcription + Concatenate
.CAT Catalog
(file name extension)
CATS Computer
Assisted Training System
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
CBC Cipher Block
Chaining
CBCR Channel Byte
Count Register
CBEMA Computer and
Business Equipment
Manufacturers Association
CBGA Ceramic Ball
Grid Array
CBI Computer
Based Instruction
CBL Computer
Based Learning
.CBL COBOL source
code (file name extension)
CBMS
Computer-Based Mail System
CBR 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
CCITT Comite
Consultatif International Telegraphique et Telephonique/
Consultative
Committee for International Telegraph and Telephone
CCL Connection
Control Language
CCP Console
Command Processor
CCS Common
Command Set + Common Communications Services +
Common
Communications Support +
Continuous
Composite Servo
.CCS Color Calibration
System (file name extension)
CCSD Cellular
Circuit-Switched Data
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]
CDC 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 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
CDOS Concurrent
Disk Operating System
CDPD Cellular
Digital Packet Data
CDR Call Detail
Record + Call Detail Recording
CD-R Compact Disk
- Recordable
CD-RDx Compact Disk
- Read Only Memory Data Exchange Standard
CDRL Contract
Data Requirements List
CD-ROM Compact Disk
- Read Only Memory
CD-RTOS Compact Disk
- Real Time Operating System
CDS Current
Directory Structure
CDSA Common Data
Security Architecture
.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 +
Convert
Enable
CEG Continuous
Edge Graphics
CEI Conducted
Electromagnetic Interference
CEMS Constituent
Electronic Mail System
CEOP Conditional
End Of Page
CERN The European
Particle Physics Laboratory (initials
originally
from Conseil European pour la Recherche Nucleaire)
CERT Computer
Emergency Response Team
CFB Cipher Feedback
+ Configurable Function Block
.CFG
Configuration (file name extension)
CFM Code
Fragment Manager [Macintosh]
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 Common
Gateway Interface + Computer Generated Images +
Computer
Graphics Interface
.CGM Computer
Graphics Metafile (file name extension) +
Graph (file
name extension) [Lotus 1-2-3] [LDC]
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
.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
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
CIM CompuServe
Information Manager +
Computer
Integrated Manufacturing
CIO Chief
Information Offier
CIOCS
Communication Input/Output Control System
CIP Command
Interface Port
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
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
CLI Call-Level Interface + Clear Interrupt Flag
+
Command Line
Interface
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) [Windows]
CLS Clear Screen
CLTP
Connectionless Transport Protocol
CLTS Clear Task
Switch Flag
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
CMC Common Mail
Calls + Common Messaging Calls +
Communication Mangement Configuration +
Complement
Carry Flag +
Computer-Mediated Communication
[Internet]
.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 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
Complementary Metal-Oxide Semiconductor
CMOV Conditional
Move
CMP Compare +
Computer
CMPS Compare word
String
CMS Code
Management System + Compiler Monitor System +
Conversation Monitor 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 Administrator [Novell]
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 Retrieval
CNN Composite
Network Node
CNSS Core Nodal
Switching Subsystem [Internet]
.CNT Contents
(file name extension)
CNV Conventional
(pertaining to Memory)
CNVT Convert
CNX Certified
Network Expert
CO Central
Office + Command Output + Convert Out
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
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 Commercial
(organization Domain name) [Internet] +
Common
Object Model [Microsoft]
.COM Command
(file name extension)
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
COMP Compare +
Communications
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
CORBA Common
Object Request Broker Architecture
CoREN Corporation
for Research and Enterprise Network
COS Compatible
Operating System
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
CP Copy
Protected
CPA Certified
Public Accountant
CPC Constant
Point Calculation
CPCS Check
Processing Control System [IBM]
CPE Central
Processing Element +
Customer
Premise Equipment +
Customer
Provided Equipment
.CPE Cover Page
(file name extension)
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)
CP/M Control Program
for Microcomputers [Digital Research]
CPS Characters
Per Second + Cycles Per Second
CPT Command Pass
Through
CPU Central
Processing Unit
CR Carriage
Return
CRAM Cyberspatial
Reality Advancement Movement
CRC Cyclic
Redundancy Check
.CRD Cardfile
(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
CR/LF Carriage
Return/Line Feed
CROM Control Read
Only Memory
CRT Cathode Ray
Tube
CRTC CRT
Controller
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 Packet
Switched Data Service
CSE Certified
System Engineer
CSFI
Communication Subsystem For Interconnection
CSG Constructive
Solid Geometry +
Consulting
Services Group [Lotus]
CSI Command
Sequence Introducer + CompuServe Incorporated
CSID Call Subscriber
ID
CSL Computer
Sensitive Language
CSLIP Compressed
Serial Line Interface Protocol [Internet]
CSM
Communications Services Manager
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 +
Commercial
Subroutine Package +
CompuCom
Speed Protocol [CompuCom]
CSPDN Circuit
Switched Public Data Network
CSS * Continuous
System Simulator (Language)
CSS Cascading
Style Sheets [Microsoft] +
Contact
Start-Stop
CSSM
Client-Server Systems Management [IBM]
CSTA
Computer-Supported Telephony Applications
CSU Channel
Service Unit
CSV
Circuit-Switched Voice +
Comma-Separated Value/Variable +
Common
Services Verbs (interface) [Microsoft]
C&T Chips
and Technologies
CTB Cipher Type
Byte
CTC Channel To
Channel
CTCP
Client-To-Client Protocol
CTI
Computer-Telephony Integration
CTOS Computerized
Tomography Operating System +
Convergent
Technologies Operating System
CTPA Coax-to-Twisted-Pair Adapter
CTRL Control
CTS Clear To
Send
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)
CUT Control Unit
Terminal
CUTE Clarkston
University Terminal Emulator
CUU Cursor Up
CVF Compressed
Volume File
CVGA Color Video
Graphics Array
CVIA Computer
Virus Industry Association
CVT Convert
CVW CodeView for
Windows
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]
CYL Cylinder
CYMK
Cyan-Yellow-Magenta-Black (color model)
D
D/A Digital to
Analog
DAA Data Access
Arrangement +
Decimal
Adjust for Addition
DAC Data
Acquisition and Control +
Digital to
Analog Converter
DAD Desktop
Application Director [Borland]
DAI Distributed
Artificial Intelligence
DAL Data Access
Language [Apple Computer] +
Disk Access
Lockout
DAM Data
Acquisition and Monitoring
DAO Data Access
Object [Microsoft]
DAP Data Access
Protocol [DEC] +
Developer
Assistance Program
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
DAT Digital
Audio Tape + Disk Array Technology
.DAT Data (file
name extension)
DATACOM Data
Communications
DAV Digital
Audio-Video
dB Decibel
DB Data Base +
Data Buffer
dBA Adjusted
Decibel
DBCS Delivery Bar
Code Sorter + Double-Byte Character Set
.DBF Database
(file name extension)
DBIS Dun &
Bradstreet Information Services
DBM Data Base
Manager
DBMS Data Base
Management System
DBS Data Base
Server
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 Direct Chip
Attach Module
DCB Device
Control Block + Disk Coprocessor Board [Novell]
DCC 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] +
Driver
Configuration File [Lotus]
D-CHANNEL Data Channel
DCI Display
Control Interface
DCL Data Control
Language + Declaration +
DEC Command
Language [DEC] +
Device Clear
+ Digital Control Logic +
Digital
Command Language [Digital]
DCP 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)
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 Data
Definition Language + 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 + 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
DDP Distributed
Data Processing
DDS Digital
Dataphone Service [AT&T] + Design Data Sheet +
Digital Data
Storage + Distributed Database Services
DDX Digital Data
Exchange
DE Device End
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 Document
Enabled Networking [Novell-Xerox]
DES Data Encryption
Standard + Data Entry Sheet
.DES Description
(file name extension)
DET Device
Execute Trigger
DEV Device
DF Data Field +
Destination Field + Device Flag +
Double Flag
DFC Data Flow
Control
DFM Design For
Manufacturability [IBM]
DFS Distributed
File System
DFSMS Data
Facility Storage Management Subsystem [IBM]
DFT Design For
Testability + Diagnostic Funtion 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)
DI Data In +
Destination Index
DIA Document Interchange
Architecture [IBM]
DIB Device
Independent Bitmap +
Directory
Information Base
DIBOL DEC Business
Oriented Language
.DIC Dictionary
(file name extension)
DID Direct
Inward Dialing
DIF Data
Interchange Format
DIFFSENS Differential
Sense
DIIP Direct
Interrupt Identification Port
DIMM Dual-Inline
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 Dynamic
Impedance Stabilization [CompuCom]
DISA Data
Interchange Standards Association
DISP Displacement
(offset)
DIT Directory Information Tree
DIV Divide
DIVE Direct
Interface Video Extension [OS/2 Warp]
DIW D-Inside
Wire [AT&T]
.DIZ Description
In Zip (file name extension)
DL Download
(also D/L)
DL/1 Data
Manipulation Language 1 [IBM]
DLC Data Link
Control (protocol) [IBM]
DLCI Data Link
Connection Identifier
DLD Display List
Driver
DLE Data Link
Escape
DLL Dynamic Link
Library
DLM Dynamic Link
Module
DLP Digital
Light Processing [TI]
DLR DOS LAN Requester
DLT Digital
Linear Tape
DM Distributed
Memory
DMA Direct
Memory Access/Addressing
DMAC DMA
Controller
DMACS Distributed
Manufacturing Automation & Control Software
DMD Digital
Micromirror Device [TI]
DME Distributed
Management Environment
DMF Distribution
Media Format [Microsoft]
DMI Desktop
Mangement Interface
DML Data
Manipulation Language
DMM Digital
Multimeter
DMMS Dynamic
Memory Management System
DMOS Double-diffused
Metal-Oxide Semiconductor
DMP Dot Matrix
Printer
DMPC Distributed
Memory Parallel Computer
DMQS Display Mode
Query and Set [IBM]
DMS Data
Management Software + Data Management System
DMSD Digital
Multistandard Decoding
DMT Digital
Multi-Tone
DMTF Desktop
Management Task Force
DMY Day Month
Year
DN Down
DNC Direct
Numerical Control
DNIC Data Network
Identification Code
DNIS Dialed
Number Identification Service
DNS Domain
Naming System
DO Data Out +
Distributed Objects
.DOC Document +
Documentation (file name extensions)
DOE Distributed
Objects Everywhere
DOIP Dial Other
Internet Providers [IBM]
DO-IT
Disabilities, Opportunities, Internetworking and
Technology
DOMF Distributed
Object Management Facility
DOS Disk
Operating System
DOSEM DOS
Emulation
DOW Day Of Week
DP Data
Processing
DPA Demand
Protocol Architecture [3Com]
DPAM Demand
Priority Access Method
DPAREN Data Parity
Enable [IBM]
DPB Drive
Parameter Block
DPC Direct
Program Control
DPI Dots Per
Inch
DPL Descriptor
Privilege Level
DPM Digital
Panel Meter
DPMA Data
Processing Management Association
DPMI DOS Protected Mode Interface [Microsoft]
DPMS Display
Power Management Support
DPO Data Phase
Optimization
DPS Document
Processing System
DPSK Differential
Phase Shift Keying
DPtoTP Display
Coordinates to Tablet Coordinates
(converting)
DQL DataEase
Query Language [DataEase International]
DR Data
Received
D/R Direct or
Reverse
DRAM Dynamic
Random Access Memory
DRAW Direct Read
After Write
DR.BOND Dial-up
Router Bandwith On Demand [NEC]
DRDA Distributed
Relational Database Architecture [IBM]
DR-DOS Digital
Research-Disk Operating System
DRDW Direct Read
During Write
DRI Digital
Research Incorporated
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
DSA Directory
System Agent
DSAP Destination
Service Access Point
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)
DSIS Distributed
Support Information Standard
DSL Digital
Subscriber Line +
Dynamic
Simulation Language
DSMA Digital
Sense Multiple Access
DSOM Distributed
System Object Model
DSP Digital
Signal Processing/Processor +
Directory
Synchronization Protocol [Lotus]
DSQD Double
Sided, Quad Density (diskette)
DSR Data Set
Ready + Device Status Register +
Device
Status Report
DSS Decision
Support System + Digital Signature Standard
DSSI Digital
Standard Systems Interconnect [DEC]
DSSS
Direct-Sequencing Spread Spectrum
DSTN Double
Supertwisted Nematic
DSU Data Service
Unit + Digital Service Unit
DSVD Digital Simultaneous Voice and Data
DSW Data Status
Word + Device Status Word
D2T2 Dye
Diffusion Thermal Transfer (printing)
DTA Disk
Transfer Area
.DTA Data (file
name extension)
DTC Desktop
Conferencing
DTD Document Type
Definition
DTE Data
Terminal Equipment + Dumb Terminal Emulator
DTF Distributed
Test Facility
DTL Dialog Tag
Language [IBM] + Diode-Transistor Logic
DTMF Data Tone
Multiple Frequency + Dual Tone Multifrequency
DTP Desktop Publishing
+ Distributed Transaction Process
DTR Data
Terminal Ready + Data Transfer Rate
DTV Desktop
Video
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 DESQview
Script (file name extension)
DVC Desktop
Video Conferencing
DVD Digital
Video Disk
DVE Digital
Video Effect
DVI Digital
Video Interactive
.DVI Device
Independent (file name extension)
DVMRP Distance
Vector Multicast Routing Protocol [Internet]
.DVR Device
Driver (file name extension) (Also see .DRV)
DWG Drawing
D2X Decimal To
Hexadecimal [REXX]
.DXB Drawing
Interchange Binary (file name extension)
[AutoCAD]
DXC Data
Exchange Control
DXF Drawing
Exchange Format
E
EA Effective
Address + Extended Attribute [OS/2]
EAR External
Access Register
EARN European
Academic Research Network
EAROM Electrically
Alterable Read Only Memory
EARS Electronic
Access to Reference Services
EATA Enhanced AT
Bus Attachment
EBC EISA Bus
Controller
EBCT Electron
Beam Computed Tomography
EBCDIC Extended
Binary Coded Decimal Interchange Code [IBM]
EBI Equivalent
Background Input +
Extended
Background Investigation
EBT Electronic
Benefits Transfer
EC Electronic
Commerce + Error Control
ECAL Enjoy
Computing And Learn
ECAT Electronic
Card Assembly and Test [IBM]
ECB Electronic
Codebook + Event Control Block
ECC Error Check
Code + Error Checking and Correction +
Error
Correction Code
ECD Enhanced
Color Display
ECHO European
Commission Host Organization [Internet]
ECI External
Call Interface
ECL Emitter
Coupled Logic
ECM Electronic
Control Module
ECMA European
Computer Manufacturers Association
ECNE Enterprise
Certified NetWare Engineer [Novell]
ECP
Enhanced/Extended Capabilities Port [Microsoft]
ECTL Electronic
Communal Temporal Lobe
ECU EISA
Configuration Utility
ED Erase
Display
EDA Embedded
Document Architecture [Go Corporation]
EDC Enhanced
Data Correction +
Error
Detection and Correction
EDDC Extended
Distance Data Cable
EDGAR Electronic
Data Gathering, Analysis and Retrieval
EDI Electronic
Data Interchange +
Electronic
Document Interchange [DEC]
EDIFACT EDI for
Administration Commerce and Transport
EDL Edit
Decision List
EDLC Ethernet
Data Link Control
EDLIN Editor (Line
Text)
EDM Electronic
Document Management
EDO Extended
Data Out
EDOS Enhanced DOS
for Windows
EDP Electronic
Data Processing
EDPM Electronic
Data Processing Machine
EDRAM Extended
Dynamic Random Access Memory
EDS Electronic
Data Systems (corporation)
EDSAC * Electronic
Delay Storage Automatic Computer
EDSI Enhanced
Small Device Interface
EDU Education
(organization Domain name) [Internet]
EDVAC * Electronic
Discrete Variable Automatic Computer
(First
stored-program digital computer)
EE Extended
Edition [IBM]
EEC Extended
Error Correction
EEG
Electroencephalogram
EEL Epsilon
Extension Language
EEM Extended
Memory Management
EEMS Enhanced
Expanded Memory Specification
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
EFL Emitter
Follower Logic
EFTS Electronic
Funds Transfer System
EGA Enhanced
Graphics Adapter
EGP Exterior
Gateway Protocol
EGREP Extended Global Regular Expression Print
[Unix]
EHLLAPI Emulator
High Level Language Application
Programming
Interface [IBM]
EIA Electronic
Industries Association
EIDE Enhanced
Integrated Drive Electronics
EIS Executive
Information System
EISA Extended
Industry Standard Architecture
EL
Electroluminescent (display) + Erase Line
ELAN Emulated
Local Area Network
ELC Embedded
Linking and Control
ELF Extremely
Low Frequency
ELS Entry Level
System
EM Electronic
Mail + Emphasized + End of Medium +
Expanded
Memory
EMA Electronic
Mail Association +
Enterprise
Management 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
EMI
Electromagnetic Interference
.EML Electronic
Mail (file name extension)
EMM Expanded
Memory Manager
EMR
Electro-Magnetic Radiation +
Enhanced
Metafile Record
EMS Electronic
Mail System + Electronic Message Service +
Expanded
Memory Specification [LIM]
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] + End Of String
EOSDIS Earth
Observing System Data and Information System [NASA]
EOT End Of Table
+ End Of Tape (marker) + End Of Text +
End Of
Transmission
EP
Electrophotographic Engine
EPL Effective
Privilege Level
EPLD Electrically
Programmable Logic Device
EPM Enhanced
Editor for Presentation Manager [IBM] +
Enterprise
Process Management [IBM]
EPP Enhanced
Parallel Port
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]
ERIC Educational
Resources Information Center [Internet]
ERLL Enhanced Run
Length Limited
EROM Erasable
Read Only Memory
EROS Earth
Resources Observation System [U.S. Geological Survey]
ERR Error
ER/RC Extended
Result/Response Code
ES Extra
Segment
ESA Enterprise
Systems Architecture [IBM] +
European
Space Agency
ESC EISA System
Component + Escape
ESCM Extended
Services Communications Manager [IBM]
ESCON Enterprise
System Connection (Architecture) [IBM]
ESC/P Epson
Standard Code for Printers
ESD Electronic
Software Distribution +
Electrostatic Discharge
ESDI Enhanced
Small/System Device Interface
ESI Enhanced
Serial Interface (specification) [Hayes]
ESMR Enhanced
Specialized Mobile Radio
ESN Electronic
Security Number
ESP Emulation
Sensing Processor +
Enhanced
Serial Port [Hayes] +
Estimated
Selling Price
ESR Event
Service Routine
ESS Electronic
Switching System
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]
ETOM Electron-Trapping
Optical Memory
ETPL Endorsed
Tempest Products List
ETS Econometric
Time Series
ETX End Of Text
EU Execution
Unit
EUC End User
Computing + Extended Unix Code [IBM]
EUI End-User
Interface
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]
ExCA Exchangeable
Card Architecture [Intel]
.EXE Executable
(file name extension)
EXE2BIN Program used
to convert an (.EXE) file to binary
format
(.COM) file
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]
FAT File
Allocation Table
FAX Facsimile
.FAX Fax (file
name extension)
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
FCI Flux Changes
per Inch
FCR FIFO Control
Register
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
FDISK Fixed Disk
FDM
Frequency-Division Multiplexing
FDX Full Duplex
FECN Forward Explicit Congestion Notification
FED
Field-Emitter Display
FEFO First-Ended,
First-Out
FEP Front End
Processor
FEPI Front End
Programming Interface
FeRAM
Ferroelectric RAM
FESDK Far East
Software Development Kit [Microsoft]
FET Field Effect
Transistor
FF Flip-Flop +
Form Feed
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]
FHSS
Frequency-Hopping Spread Spectrum
FIF Fractal
Image Format
FIFO First-In,
First-Out
FILO First-In,
Last-Out
FIP File
Processor Buffering
FIPS Federal
Information Processing Standard
FIR Finite
Impulse Response
FIRST Forum of
Incident Response and Security Teams
FIX Federal
Internet Exchange
FLC
Ferro-electric Liquid Crystal
FLD Field
FLL FoxPro Link
Library [Microsoft Fox Pro]
FLOPS Floating
Point Operations Per Second
FMS Forms
Management System
FMT Format
FNT Font
FOCUS Forum of
Control Data Users
FOD Fax On
Demand
FOG First
Osborne Group
FOIRL Fiber Optic
Inter Repeater Link [IEEE]
FOLDOC Free On-Line
Dictionary Of Computing
.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 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
FQDN Fully
Qualified Domain Name [Internet]
FRAD Frame Relay
Access Device +
Frame Relay
Assembler/Disassembler
FRAG Fragment +
Fragmentation
FRAM Ferroelectric Random-Access Memory
FRC Funtional
Redundancy Checking
FRED Frame Editor
+ Front-End to Dish
FRPI Flux
Reversals Per Inch
.FRS WordPerfect
Graphics Driver (file name extension)
FS File
Separator
FSD File System
Driver [OS/2]
FSE Full Screen
Editor
FSF Free
Software Foundation [Internet]
FSK Frequency
Shift Keying
FSN Full Service
Network
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
FTM Flat Tension
Mask [Zenith]
FTP File
Transfer Protocol [Internet]
FTPD File
Transfer Protocol Daemon
FTTC Fiber To The
Curb
FTS Federal
Telecommunication System
FTX Fault
Tolerant Unix
FUI File Update
Information
FUNC Function
FVT Full Video
Translation
FYI For Your
Information
G
GA General
Availability
GAAP Generally Accepted
Accounting Principles
GAL Generic
Array Logic
GAPI Gateway
Application Programming Interface
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]
GCR Group Code
Recording
GDA Global Data
Area
GDDM Graphics
Data Display Manager
GDG Generation
Data Group [IBM]
GDI Graphical
Device Interface
GDLC Generic Data
Link Control [IBM]
GDP Graphic Draw
Primitive
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 Graphic
Environment Operating System [Geoworks]
GET Get Execute
Trigger
GGP
Gateway-Gateway Protocol [Internet]
GHZ Gigahertz
.GIF Graphics
Interchange Format (file name extension)
GIGO Garbage In,
Garbage Out
GII Global
Information Infrastructure
GILS Government Information
Locator Service
GIS Geographic
Information System +
Global
Information Solutions [AT&T]
GIX Global
Internet Exchange [Internet]
GKS Graphical
Kernal System
GL Graphics
Language
G/L General
Ledger
GLIS Global Land Information System [US Geological
Survey]
GLM General
Linear Models
GLOBE Global
Learning by Observations to Benefit
the
Environment [Internet]
.GLY Glossary
(file name extension) [Microsoft Word]
GMP Global Mobile
Professional
GMR Giant
Magneto-Resistive
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)
GOSIP Government
Open Systems Interconnection Profile
GOV Government
(organization Domain name) [Internet]
GP Gas Plasma +
General Purpose
GPF General
Protection Fault
GPI Graphics
Programming Interface
GPIB General
Purpose Interface Bus
GPR General
Purpose Register [IBM]
GPS Global
Positioning Satellite/System
GPSS * General
Purpose Systems Simulator (language)
GRADD Graphics
Adapter Device Driver [IBM]
GRE 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)
GSTN General
Switched Telephone Network
GTE General
Telephone Electronics (corporation)
GTL Gunning
Transceiver Logic
GTO Guide To
Operations [IBM]
GUI Graphical
User Interface
GUID Global
Universal ID
GVT Global
Virtual Time
GW-BASIC Gee Whiz
BASIC
.gz Compressed
file (compressed filename extension -
using GNU
gzip compression/decompression program) [Unix]
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"]
HASP Houston
Automatic Spooling Priority (System)
HBA Host Bus
Adapter
HCSS High
Capacity Storage System
HCU Home
Computer User
HD Hard Disk +
High Density
HDA Head Disk
Assembly
HDCD High
Definition Compatible Digital
HDF Hierarchical
Data Format [NCSA]
HDI Head to Disk
Interference
HDLC High-Level
Data Link Control
HDR Header
HDSC High Density
Signal Carrier [DEC]
HDSL
High-Data-Rate Digital Subscriber Line
HDSS Holographic
Data Storage System
HDT Host Digital
Terminal
HDTV High
Definition Television
HDVD High
Definition Volumetric Display
HDW Hardware
HDX Half Duplex
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
HH Hour
HIF Hyper-G
Interchange Format
HIFD High-Density
Floppy Disk
HIL Human
Interface Link [HP]
HIMEM High Memory
HIPPI High
Performance Parallel Interface
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
HMM Hidden
Markov Model
HMOS High Density
Metal Oxide Semiconductor +
High Speed Metal Oxide Semiconductor
HMP Host
Monitoring Protocol
HOTT Hot Off The
Tree (electronic newsletter)
HP
Hewlett-Packard (Company)
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
HPPA
Hewlett-Packard Precision Architecture
HPPI High
Performance Parallel Interface
HPR High
Performance Routing [IBM]
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 High Speed
Channel
HSI Hue,
Saturation, Intensity
HSM Hierarchical Storage Management
HSP High Speed
Printer
HSSI High Speed
Serial Interface
HST High Speed
Technology [U.S. Robotics]
.HST History +
Host (file name extensions)
HSV Hue
Saturation Value
HTML HyperText
Markup Language
HTTP HyperText
Transport Protocol
HTTP-NG HTTP Next
Generation
HUT Hopkins
Ultraviolet Telescope
H/V
Horizontal/Vertical
HVP Horizontal
& Vertical Position
H/W Hardware
HWCP Hardware
Code Page
HWD Height-Width-Depth
.HYP Hyphenation
(file name extension)
HYTELNET
Hypertext-browser for Telnet Accessible Sites
Hz Hertz
I
IAB Internet
Architecture Board [Internet]
IAC
Inter-Application Communication [Macintosh]
IAG Instruction
Address Generation
IAK Internet
Access Kit [IBM]
IAL *
International Algebraic Language
(ALGOL was
first called IAL)
IANA Internet
Assigned Numbers Authority [Internet]
IAP Internet
Access Provider [Internet]
IAT Import Address Table
IAUP Internet
User Account Provider [Internet]
IBC Instrument
Bus Computer
iBCS Intel Binary
Compatibility Specification
IBM
International Business Machines (Corporation)
IBM-GL IBM Graphics
Language
IC Input Circuit + Integrated Circuit +
Interrupt Controller
ICA
Intra-application Communications Area
ICAP Internet
Calendar Access Protocol [Lotus]
ICAS Intel
Communicating Applications Specifications
ICB Internet
Citizen's Band
ICCP Institute
for the Certification of Computing Professionals
ICE In-Circuit
Emulator [Intel]
ICI Image
Component Information
ICL Interface
Clear
ICLID
Incoming-Call Line Identification
ICM Image Color
Matching [Kodak]
ICMP Internet
Control Message Protocol [Novell]
.ICO Icon (file
name extension)
iCOMP Intel
Comparative Microprocessor Performance [Intel]
ICP Integrated
Channel Processor
ICR Intelligent
Character Recognition
ICS Intuitive Command
Structure
ICU 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
IDDE Integrated
Development & Debugging Environment [Symantec]
IDE Imbedded
Drive Electronics +
Integrated
Development Environment [Borland] +
Integrated
Drive Electronics +
Intelligent Drive Electronics +
Interactive
Design and Engineering +
Interface
Design Enhancement
IDEA
International Data Encryption Algorithm
IDF Intermediate
Distribution Frame
IDIV Integer
Divide
IDL Interface
Definition Language
IDMS Integrated
Data Base Management System
IDNX Integrated
Digital Network Exchange [IBM]
IDP Integrated
Data Processing
IDR Intelligent
Document Recognition
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 [Internet]
IESG Internet
Engineering Steering Group [Inernet]
I/F Interface
IFD Image File
Directory
IFF
Interchangeable File Format [Amiga]
IFG Incoming Fax
Gateway
IFP Instruction
Fetch Pipeline
IFS Installable
File System
IFSM Information
Systems Management
IGA Integrated
Graphics Array
IGC Integrated
Graphics Controller
IGES Initial
Graphics Exchange Standard
IGMP Internet
Group Multicast Protocol [Internet]
IGRP Interior
Gateway Routing Protocol [Cisco]
IGS Internet Go
Server [Internet]
IHD Integrated
Help Desk [IBM]
IHV Independent
Hardware Vendor
IIF Immediate IF
III Interstate
Identification Index [NCIC]
IIOP Internet
Inter-Operability Protocol
IIR Immediate
Impulse Response
IIS Internet
Information Server [Microsoft]
IITF Information
Infrastructure Task Force
iKP Internet
Keyed Payments [IBM]
ILS
International Language Support
IMACS Image
Management and Communication System
IMAP Internet
Message Access Protocol [Internet]
IMAX Maximum
Image
IMDS Image Data
Stream (format) [IBM]
IME Input Method
Editor
IMG Image
IML Initial
Microcode Load [IBM]
IMP
Information/Interface Message Processor
IMPA Intelligent
Multi-Port Adapter [DCA]
IMR Internet
Monthly Report [Internet]
IMS Information Management System +
Intermediate
Maintenance Standards
IMTC
International Multimedia Teleconferencing Consortium
IMTV Interactive
Multimedia Television
IMUL Integer
Multiply
IN Input
INC Increment
.IND Index (file
name extension)
.INF Information
(file name extension)
.INI Initialize
(file name extension)
INIT
Initialization + Initialize
INM Integrated
Network Management
INS Input String
+ Integrated Network Server
INT Integer + Internal + Interrupt +
International (organization Domain name) [Internet]
INTA Interrupt
Acknowledge
InterNIC Internet
Network Information Center [Internet]
INTO Interrupt if
Overflow occurs
I/O Input/Output
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]
IOPL Input/Output
Priviledge Level
IOSGA Input/Output
Support Gate Array
IP Instruction
Pointer + Internet Protocol
IPC Instructions
Per Clock + Interprocess Communication
IPCP Internet
Protocol Control Protocol
IPDS IBM Personal
Dictation System [IBM] +
Intelligent
Printer Data Stream [IBM]
IPFC Information
Presentation Facility Compiler [IBM]
IPI Intelligent
Peripheral Interface
IPL Initial
Program Load/Loader +
Ion
Projection Lithography
IPL * Information
Programming Language
IPM
Interpersonal Message
IPng Internet
Protocol, next generation
IPSE Integrated
Project Support Environment
IPTC
International Press Telecommunications Council
IPX Internetwork
Packet Exchange [Novell]
IQL Interactive Query
Language
IR Infrared
IRC Internet
Relay Chat [Internet]
IRD Integrated
Receiver/Descrambler
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
IRQ Interrupt
Request
IRTF Internet
Research Task Force [Internet]
IRX Information
Retrieval Experiment
IS Information
System + Interrupt Status
ISA Industry
Standard Architecture +
Instruction-Set Architecture
ISAM Indexed
Sequential-Access Management/Method
ISAPI Internet
Servier API [Microsoft]
ISBN
International Standard Book Number
ISC Instruction
Set Computer + Inter-Systems Communication [IBM]
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
ISM Internet
Service Manager [Mircrosoft]
ISMF Interactive
Storage Management Facility
ISOC Internet
Society
ISO/OSI
International Standards Organization/Open
Systems
Interconnection (model)
ISP Internet
Service Provider [Internet] +
Interrupt
Stack Pointer + Interrupt Status Port
ISPF Interactive
System Programming Facility
ISR Information
Storage and Retrieval +
Interrupt
Service Routine +
Interrupt Status Register
ISSN
International Standard Serial Number
ISV Independent
Software Vendor
IT Information
Technology
ITB Information
Technology Branch + Intermediate Text Block
ITC
International Typeface Corporation
ITN
Identification Tasking and Networking
ITR Internet
Talk Radio
ITU
International Telecommunication Union
ITUG
International Telecommunications User Group
ITU-TSS
ITU-Telecommunication Standarts Section
ITV Interactive
Television
ITX Intermediate
Text Block
IU Integer Unit
IUAP Internet
User Account Provider [Internet]
IUS/ITB Interchange
Unit Separator/Intermediate Transmission
Block
IVIS Interactive
Video Information System
IVL Independent
Vendor League + Intel Verification Lab
IVR Interactive
Voice Response
IVS Interactive
Videodisk System
IVT Interrupt
Vector Table
IV&V
Independent Verification & Validation
I-WAY Information
Highway
IXC Interchange
Carrier
J
JA Jump Address
+ Jump if Above
JAD Joint
Application Design
JAE Jump if
Above or Equal
JANET Joint
Academic Network
JBE Jump if
Below or Equal
JC Jump if
Carry set
JCL Job Control
Language
JDBC Java Database Connectivity
JDK Java
Development Kit
JE Jump if
Equal
JEDEC Joint
Electronic Devices Engineering Council
JEIDA Japanese
Electronics Industry Development Association
JES Job Entry
System
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
JIPS JANET
Internet Protocol Service
JL Jump if Less
JLE Jump if Less
than or Equal to
JMP Jump
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
.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
JPE Jump if
Parity Even
JPEG Joint
Photographic Experts Group
JPL Jet
Propulsion Laboratory
JPO Jump if
Parity Odd
JS Jump if Sign
JZ Jump if Zero
JNZ Jump if Not
Zero
JUGHEAD Jonzy's
Universal Gopher Hierarchy
Excavation
and Display [Internet]
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]
KBPS Kilobytes
Per Second
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
KIS Knowbot
Information Service [Internet]
KPI Kernal
Programming Interface
KQML Knowledge
Query and Manipulation Language
KSH Korn Shell
(program) [Unix]
KSPH Keystrokes
Per Hour
KSR Keyboard
Send Receive
KRS Knowledge
Retrieval System
L
LADDR Layered
Device Driver Architecture [Microsoft]
LALL Longest
Allowed Lobe Length
LAN Local Area
Network
LANACS Local Area
Network Asynchronous Connection Server
LANE Local Area
Network Emulation
LAPB Link Access
Procedure Balanced (protocol)
LAPD Link Access
Procedure Direct (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]
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
LCD Liquid
Crystal Display + Lowest Common Denominator
LCF Low Cost
Fiber
LCK Library
Construction Kit [Mircrosoft FoxPro]
LCP Link Control
Protocol
LCR Line Control
Register
LCU Last Cluster Used
LDA Logical
Device Address
LDAP Lightweight
Directory Access Protocol [IBM]
LDC Lotus
Development Corporation
LDM Long
Distance Modem
LDT Local
Descriptor Table
LE Less or
Equal
LEA Load Effective
Address
LEAF Law
Enforcement Access Field
LEC Local
Exchange Carrier
LED Light
Emitting Diode
LEL Link, Embed
and Launch-to-edit [Lotus]
LEM Language
Extension Module
LEN Low Entry
Networking
.LET Letter (file
name extension)
LEX Lexicon
LF Line Feed
LFI Last File
Indicator
LFN Long File
Name
LFT Low Function
Terminal [IBM]
LFU Least
Frequently Used
LGDT Load Global
Descriptor Table
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
LIMS Library
Information Management System
LINUX (Operating
system named after Linus Torvalds)
LIP Large
Internet Packet
LIPS Logical
Inferences Per Second
LISP List
Processing (Language)(See HLL)
LISTSERV List Server
[Internet]
LLC Logical Link
Control
LLDT Load Local
Descriptor Table
LLF Low Level
Format
LMB Left Mouse
Button
LMBCS Lotus
Multibyte Character Set [Lotus]
LMI Local
Management Interface
LMS Lotus
Messaging Switch [Lotus]
LMSW Load Machine
Status Word
LMU LAN
Management Utilities [IBM] +
LAN Manager
for Unix
LN Logarithm (Natural)
LN:DI Lotus
Notes:Document Imaging
LNK Link
LOC Loop On-Line
Control
LOCIS Library of
Congress Information System
LOD Level Of
Detail
LODSB Load String
Byte
LOG Logarithm
(Base 10)
LOGO (Programming
Language)(See HLL)
LOOPE Loop while
Equal
LOOPNE Loop while
Not Equal
LOOPNZ Loop while
Not Zero
LOOPZ Loop while
Zero
LORE Line
Oriented Editor
LPC Local
Procedure Call
LPD Line Printer
Daemon (protocol) [Berkley]
LPI Lines Per
Inch
LPL Lotus
Programming Language [Lotus 1-2-3] [LDC]
LPM Lines Per
Minute
LPN Logical Page
Number
LPS Low-Power
Schottky
LPT Line Printer
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
LSAPI License
Services Application Program Interface
LSB Least
Significant Bit
LSC Least
Significant Character
LSD Least
Significant Digit
LSI Large Scale
Integration
LSL Link Support
Layer + Load Segment Limit
LST List
.LST List (file
name extension)
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]
LVM Logical
Volume Management [IBM]
LW Lazy Write
LZW
Lempel-Ziv-Welch (algorithm)
M
mA Milliampere
Mac Macintosh
(Apple Macintosh Computer)
MAC Media/Medium
Access Control
.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]
MAh
Milliampere-Hour
.MAI Mail (file
name extension)
MAN Manual
[Unix] + Metropolitan Area Network
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]
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
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
MBR Master Boot
Record
MBX Mailbox
MCA Micro
Channel Adapter/Architecture [IBM]
MCAD Mechanical
Computer Aided Design
MCB Memory
Control Block
MCGA Multicolor
Graphics Array
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
MCU Multi-Chip
Unit [DEC]
MD Make
Directory + Monochrome Display
MDA Monochrome
Display Adapter +
Multidimensional Analysis
.MDF Menu
Definition File (file name extension)
MDI Multiple
Document Interface
MDIC Manchester
Decoder and Interface Chip [AT&T]
MDK Multimedia Developers
Kit [Microsoft]
MDLP Modile Data
Link Protocol
MDR Minimum
Design Requirement
MDY Month Day
Year
.ME Opening
Information (file name extension) (As in READ.ME)
MEB Memory
Expansion Board
MEG Megabyte
MEM Memory
.MEN Menu (file
name extension)
MES
Manufacturing Execution System
MESI Modified,
Exclusive, Shared and Invalid (protocol)
MET Memory
Enhancement Technology [Hewlitt-Packard]
.MET Metafile
(file name extension)
MFC Microsoft
Foundataion Class [Microsoft]
MFFS Microsoft
Flash File System [Microsoft]
MFLOPS Million
Floating Point Operations Per Second
MFM Modified
Frequency Modulation
MFP
Multi-Function Peripheral/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
MGE Modular GIS
Environment
MGR Manager
MHS Message
Handling Service + Message Handling System
MHz Megahertz
MI Management
Interface
MIB Management
Information Base
MICRO One-millionth
MICS Macro
Interpretive Commands
MIDI Musical
Instrument Digital Interface
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] +
Military
(organization Domain name) [Internet]
MIM
Metal-Insulator-Metal (screen)
MIMD Multiple
Instruction Multiple Data Stream (processor)
MIME Multipurpose
Internet Mail Extension [Internet]
MI/MIC Mode
Indicate/Mode Indicate Common
MIN Minimum +
Mobile Identification Number
MINUET Minnesota
Internet Users Essential Tools [Internet]
MIPS Million
Instructions Per Second
MIS Management
Information System +
Multimedia
Information Sources [Internet]
MISC
Miscellaneous
MIX Member
Information Exchange
MKDIR Make
Directory
ML Machine
Language + Meta Language
MLAPI Multilingual
Application Programming Interface
MLC Multilayer
Ceramic +
Multilevel
Cell (program) [Internet]
MLID Multi-Link
Interface Driver
MLM Mailing List
Manager [Internet]
MM Minutes +
Month
MMA
Microcomputer Managers Association
MMC Matched
Memory Cycle + Microcomputer Marketing Council
MMCD MultiMedia
Compact Disk
MMI Man-Machine
Interface
MMIS Materials
Manager Information System
MMPM Multi Media
Presentation Manager
MMU Memory
Management Unit
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
MOM Microsoft
Office Manager [Microsoft]
MOO MUD, Object
Oriented [Internet]
MOP Maintenance
Operations Protocol
MOS Metal Oxide
Semiconductor + Magneto-Optic Storage
MOSFET Metal Oxide
Semiconductor Field Effect Transistor
MOTD Message Of
The Day
MOV Metal Ocide
Varistor + Move
MOVS Move String
MP Massively
Parallel (processing) + Multiple Processors
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
MPM Message
Passing Library [IBM]
MPMD Multiple
Processor/Multiple Data
MPP Massively
Parallel Processing +
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 Message
Queue Interface
MR
Magnetoresistive + Modem Ready
MRCF Microsoft
Realtime Compression Format
MRCI Microsoft
Realtime Compression Interface
MRI Magnetic
Resonance Imaging
MRM Most
Recently-Used Master
MRO Multi-Region
Operation
MRP Materials
Requirement Planning
MRPL Main Ring
Path Length
MRS Media
Recognition System
MRT Mean Repair
Time
MRU Maximum
Receive Unit
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
MSCDEX Microsoft
Compact Disc Extensions [Microsoft]
MSD Mass Storage
Device + Most Significant Digit +
Microsoft
System Diagnostics [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)
MSI Medium Scale
Integration
MSL Map
Specification Library + Mirrored Server Link
MSN Microsoft
Network [Microsoft]
MSO Multiple-Systems
Operator
.MSP Microsoft
Paint (file name extension) [Microsoft]
MSS Mass Storage
System
MSW Machine
Status Word
MTA Message
Transfer Agent + Multiple Terminal Access
MTBB Mean Time
Between Breakdowns
MTBF Mean Time
Between Failures
MTBJ Mean Time
Between Jams
MTF Microsoft
Tape Format [Microsoft] +
Modulation
Transfer Function
MTS Message
Transfer Service/System +
Multichannel
Television Sound
MTTD Mean Time To
Diagnose
MTTF Mean Time To
Failure
MTTR Mean Time To
Repair
MTU Maximum
Transmission Unit
MUD Multi-User
Dialogue/Dimension/Domain/Dungeon [Internet]
MUL Multiply
MUMPS
Massachusetts General Hospital Utility
Multi-Programming System (Programming Language)
MUSE Multi-User
Shared Environment
MUT Monitor
Under Test
MUX Multiplexer
MV Millivolt
MVB Multimedia
Viewer Book
MVC Multimedia
Viewer Compiler
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
NAM Number
Assignment Module
NAMPS Narrow-Band
Analog Mobile Phone Service [Motorola]
NANO One
thousand-millionth
NAP Network
Access Point
NAPLPS North
American Presentation Level Protocol
Syntax
(graphics)
NAS Network
Application Support [DEC]
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)
NAU Network
Addressable Unit
NAWS Negotiate
About Window Size
NBE Not Below or
Equal
NBI Nothing But
Initials
NBS National
Bureau of Standards + Numeric Backspace
NC Network
Computer + No Carry + Numerical Control
NCA Network
Communications Adapter
NCC Network
Control Center
.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 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
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
NEP Network
Entry Point
NES National Education
Supercomputer
NEST Novell
Embedded Systems Technology [Novell]
NET Network
(organization Domain name) [Internet]
NetBIOS Network
Basic Input/Output System [IBM]
NetBEUI NetBIOS
Extended User Interface [IBM]
.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
NG No Good
NGE Not Greater
or Equal
NHC National
Hurricane Center
NHR National
Handwriting Recognition
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
NII National
Information Infrastructure
NIM Network
Installation Management [IBM]
NIMH Nickel-Metal
Hydride
NIO Native
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
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-Network Interface
NNTP Network News
Transfer Protocol [Internet]
NOC Network
Operations Center
NOP No Operation
NOPAC Network OPAC
NOR Not Or
NOS Network
Operating System
NPA Network
Printer Alliance
NPI Network
Printer Interface
NPL
Nonprocedural Language
NPS Novell
Productivity Specialist [Novell]
NPTN National
Public Telecomputing Network
NPU Natural
Processing Unit
NPX Numeric
Processor Extension
NQS Network
Queing System [Cray]
NRC National
Research Council (Canada)
NREN National
Research and Education Network
NRZ Not Return
to Zero
NRZI Non Return
to Zero Inverted
NS Nanosecond +
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 Manger [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]
NTAS NT Advamced
Server [Microsoft]
NTF No Trouble
Found
NTFS New
Technology File System [Microsoft]
NTIA National
Telecommunications and
Information
Administration
NTIS National
Technical Information Service
NTRAS NT Remote
Access Services [Microsoft]
NTSA NetWare Telephony
Services Architecture [Novell]
NTSC National
Television Standards Committee
NUI Network User
Identification +
Network User
Interface +
Notebook
User Interface [Go Corporation]
NUL Null +
(dummy device) + (no device)
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]
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
OBD On Board
Diagnostics
OBEX Object Exchange
[Borland]
OBJ Object
OC Optical
Carrier
OCE Open
Collaborative Environment [Apple]
OCF Objects
Components Framework [Borland]
OCL Operation
Control Language + Operator Control Language
OCR Optical
Character Recognition
OCS On-Card
Sequencer
OCX OLE Custom
Control
ODA Office
Document Architecture
ODAPI Open
Database Application Programming
Interface
[Borland]
ODBC Open Data
Base Connectivity [Microsoft]
ODBMS
Object-Oriented Database Management System (also
see OODMS)
ODI Open
Datalink Interface [Novell] +
Open Device
Interconnect [NetWare]
ODM Object Data
Manager [IBM]
ODMA Open
Document Management API
ODP Open
Distributed Processing
ODS Open Data
Services [Microsoft]
ODSI Open
Directory Service Interface [Microsoft]
ODT Open Desktop
OEM Original
Equipment Manufacturer
OEP Operand
Execution Pipeline
OF Overflow
Flag
OFB Output Feedback (mode)
OFMT Output
Format for Numbers
OFS Object File
System [Microsoft] + Output Field Separator
OH Off Hook
OIDL Object
Interface Definition Language
OIS Office
Information Systems
OLAP On-Line
Analytical Processing
.OLD Old version
(file name extension)
OLE Object
Linking and Embedding [Microsoft]
OLI Optical Line
Interface [AT&T]
OLMC Output Logic
Macrocell
OLTP On-Line
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]
OMNS Open Network
Management System
OMR Optical Mark
Recognition
ONC Open Network
Computing [Sun]
ONDS Open Network
Distribution Services [IBM]
ONU Optical
Network Unit
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 Optical Photoconductor
OPCODE Operational
Code
OPD Operand
OPI Open
Prepress Interface
OPM Operations
Per Minute
OPS Operations
OPT Open
Protocol Technology
.OPT Options
(file name extension)
OPUS Octal
Program Updating System
ORACLE On-Line
Inquiry and Report Generator (UNIX DB program)
ORB Object
Request Broker [Microsoft]
ORG Organization
(organization Domain name) [Internet]
ORI Online
Retrieval Interface
.ORI Original
(file name extension)
ORS Output
Record Separator
OS Operating
System
OS/2 Operating
System/2 [IBM]
OSA Open
Scripting/System Architecture
OS/E Operating
System/Environment
OSF Open
Software Foundation
OSI Open Systems
Interconnection
OSM Off-Screen
Model
OSP On-Screen
Programming + Optical Storage Processor
OSPF Open
Shortest Path First
OSQL Object
Structured Query Language
OT Object
Technology
OTA
Operation-Triggered Architecture
OTDR Optical Time
Domain Reflectometer
OTF Open Token
Foundation
OTP One-Time
Programmable
OURS Open Users
Recommended Solutions
.OUT Outlines
(file name extension)
OUTS Output
String
OV Overflow
.OVL Program
Overlay (file name extension)
.OVR Program
Overlay (file name extension)
OWL Object/Open
Windows Library [Borland]
P
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
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 + Programmed Array Logic +
Programming
Assembly Language
.PAL Palette
(file name extension)
PALC
Plasma-Addressed Liquid Crystal (display)
PALS Principles
of the Alphabet Literacy System
PAM Pulse
Amplitude Modulation
PAP Packet-level
Procedure +
Password
Authentication Protocol +
Printer
Access Protocol
PAR Personal
Animation Recorder + Parallel
PARA Paragraph
PARC Palo Alto
Research Center [XEROX]
.PAS PASCAL
source code (file name extension)
PASCAL (Programming
Language named for Blaise Pascal)
PAX Portable
Archive Exchange [Unix]
PBE Prompt By
Example
PBGA Plastic Ball
Grid Array
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 Cipher
Block Chaining
PCD Photo
Compact Disk
PC-DOS Personal
Computer - Disk Operating System [IBM]
PCEB PCI to EISA
Bridge [Intel]
PCI Peripheral
Component Interconnect/Interface
PC-I/O Program
Controlled I/O
PCL Printer
Command Language [HP] + Process Control Language
PCM Personal
Computer Manufacturer + Pulse Code Modulation
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 Personal
Communication Services/System +
Personal
Conferencing Specification +
Planning
Control Sheet + Print Contrast Signal +
Process Control Systems + Program Counter
Store +
Programmable
Drive Table + Project Control System
PCT Private
Communications Technology
.PCT Picture
(file name extension)
.PCX Picture
Image (file name extension)
PD Public
Domain
PDA Personal
Digital Assistant
PDD Physical
Device Driver
PDF Package
Definition File + Portable Document Format +
Portable
Document File + Processor Defined Function +
Program
Development Facility
.PDF Printer Description (file name
extension)[Borland,Lotus]
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 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]
PDSS Post
Development and Software Support
PDT Performance
Diagnostic Tool [IBM] +
Programmable
Drive Table
PDU Plug
Distribution 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
PEL Picture Element
[IBM]
PEM
Privacy-Enhanced Mail [Internet]
PEN SDK Pen
Computing Software Development Kit
PEP Packetized
Ensemble Protocol [Telebit]
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]
PFR 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
PGP Pretty Good
Privacy (name of encryption program)
.PGP ProGram
Parameter (file name extension) [AutoCAD]
PGUP Page Up
PHIGS Programmers'
Hierarchial Interactive Graphics
Standards
.PHO Phone List
(file name extension)
PHS Personal
Handyphone System
PI Program
Interruption
PIA Peripheral
Interface Adapter
PIC Personal
Intelligent Communicator +
Priority
Interrupt Controller +
Program
Interrupt Controller
PICS Platform for
Internet Content Selection
PICT Picture
PID Process
Identification Number +
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
PIN Personal
Identification Number +
Process
Identification Number [Unix]
PINE Pine Is Not
Elm [Unix]
PING Packet
Internet Groper
PIO Parallel
Input/Output + Processor Input/Output +
Programmed
Input/Output
PIP Picture In
Picture + Problem Isolation Procedure +
Programmable
Interconnect Point
PIPO Parallel In,
Parallel Out
PIT Programmable
Interval Timer
PIXEL Picture
Element
PL Plus
PLA Programmable
Logic-Array
PLATO Programmed
Logic for Automatic Teaching Operations
PLC 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
PLS Primary Link
Station
PLV Production
Level Video
PL/1 * Programming
Language One
PM Presentation
Manager [IBM] +
Preventative
Maintenance + Process Manager
PMMU Paged Memory
Management Unit
PMOS Positive
Channel Metal Oxide Semiconductor
PMR Problem
Management Report [IBM]
PMS Policy
Management System
PN Processing
Node
PNA Programmable
Network Access
PNG Portable
Network Graphics
PNP Plug And
Play
PO Parity Odd
POC Point Of
Contact
POE Power Open
Environment
POH Power-On
Hours
POL Problem
Oriented Language
POP Point Of
Presence [MCI] + Pop from Stack +
Post Office
Protocol
POPA Pop All
Registers
POPF Pop Flags
POR
Power-On-Reset
POS Point Of
Sale + Positive + Programmable Object Select
POSIX Portable
Operating System Interface for Unix
POST Power-On
Self Test
POSTNET Postal
Numeric Encoding Technique
POTS Plain Old Telephone Service
POWER Performance
Optimization with Enhanced RISC [IBM]
PowerPC Performance
Optimization with Enhanced RISC-Performance
Computing
.PPD PostScript
Printer Description (file name extension)
PPDS Personal
Printer Data Stream [IBM]
PPGA Plastic Pin
Grid Array
PPM Pages Per
Minute
PPP
Point-to-Point Protocol [Internet]
PPS Packets Per
Second + Power Personal Systems [IBM]
PPTP
Point-to-Point Tunneling Protocol
PQFP Plastic Quad
Flat Pack
PRACSA Public
Remote Access Computer Standards Association
PRAM Parallel
Random-Access Machine +
Parameter
Random Access Memory
.PRD Printer
Driver (file name extension) [Word]
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)
PRINTF Print with
Formatting [C Programming Language]
PRISM Photo-Refractive
Information Storage Material
.PRJ Project
(file name extension) [Borland]
PRMD Private
Mangement Domain [X.400]
PRML
Partial-Response Maximum-Likelihood
.PRO 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
.PRS Printer
(file name extension) [WordPerfect]
PRTSC Print Screen
PS Proportional Spacing
.PS PostScript
(file name extension)
PS/2 Programming
System 2 [IBM]
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
PSM Printing
Systems Manager
PSN Packet
Switching Network
PSP Personal
Software Products (group) [IBM] +
Program Segment
Prefix
PSPDN
Packet-Switched Public Data Network
P-SRAM
Pseudo-Static Random Access Memory
PSRT PostScript
Round Table [GEnie]
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
PTF Problem
Temporary/Trouble Fix [IBM]
PUB Public
(directory) [Internet] + Publish
.PUB Publication
(file name extension) [Ventura]
PUN Physical
Unit Number
PUP PARC
Universal Packet (protocol)
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
PVS Parallel
Visualization Server
PW Password
PWB Printed Wire
Board +
Programmer's
Workbench [Microsoft]
PWD Print
Working Directory [Unix]
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]
QC Quality
Control
QDOS Quick and
Dirty Operating System
.QDI Dictionary
(file name extension) [Quicken]
.QDT Data (file
name extension) [Quicken]
QEMM Quarterdeck
Expanded Memory Manager [Quarterdeck Corp.]
QFA Quick File
Access
QFP Quad Flat
Pack
QIC Quality
Information Using Cycle Time [Hewlett-Packard] +
Quarter-Inch
Cartridge
.QIF Quicken
Import File/Interchange Format (file name extension)
.QMT Memorized
List (file name extension) [Quicken]
.QNX Indexes to
Data (file name extension) [Quicken]
QPG Quantum
Phase Gate
QPSK Quadrature
Phase Shift Keying
QTC Quicktime
Conferencing [Macintosh]
R
RA Return
Authorization
RACF Resource
Access Control Facility
RAD Rapid
Application Development
RADAR Rights,
Availabilities, Distribution Analysis
and
Reporting [Disney]
RADB Routing
Arbiter Data Base
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
RAMDAC Random
Access Memory Digital-to-Analog
Converter
[Sierra]
RAMP Remote
Access Maintenance Protocol [Internet]
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]
RAVE Rendering
Acceleration Virtual Engine [Apple Computer]
RB Right Button
(of 2 or 3 button Mouse)
RBBS Remote
Bulletin Board System
RBCS Remote Bar
Code System
RBOC Regional
Bell Operating Company
RCL Rotate Carry
Left
RCP Remote
Control Panel + Remote Copy [Internet] +
Restore
Cursor Position
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 Mangement System
RDCLK Received
Timing Clock
RDP Reliable
Datagram Protocol
RDRAM Rambus
Dynamic Random Access Memory
RDSR Receiver
Data Service Request
RDTO Receive Data
Transfer Offset [IBM]
.REC Recorder
(file name extension)
REC. Recreation
[USENET Newsgroup Category]
.REF Reference
(file name extension)
REG Register
REGAL Rigid Epoxy
Glass Acrylic Laminate
RELSECT Relative
Sector
REM Remark +
Remote + Ring Error Monitor
REN Rename
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
REX Relocatable
Executable
REXEC Remote
Execution
REXX Restructured
Extended Executor (language) [IBM]
RF Radio
Frequency
RFC Request For
Comments [Internet]
RFD Request for
Discussion [Internet]
RFI Radio
Frequency Interference
RFP Request for
Proposal
RFQ Request for
Quotation
RFS Remote File
Sharing + Remote File System
RFT Revisable
Form Text + Rich Text Format
RFU Reserved For Future Use
RGB
Red-Green-Blue (color model)
RI Referential
Integrity + Ring Indicate
RIFF Resource
Interschange File Format [Microsoft]
RIM Remote
Installation and Maintenance [Microsoft]
RIME RelayNet
International Message Exchange
RIP Remote
Imaging Protocol +
Routing
Information Protocol [Novell]
RIPEM Riordan's
Internet Privacy Enhanced Mail
RIPS Raster Image
Processing System
RISC Reduced
Instruction Set Computer
RJE Remote Job
Entry
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
RMDIR Remove
Directory
RMON Remote
Monitor/Monitoring
RMP Remote
Maintenance Processor [IBM]
RMS Record
Management Services + Root Mean Square
RMW
Read-Modify-Write
RN Read News
[Internet]
RND Random
RNG Random
Number Generator
RNP Regional
Network Provider
R-O Read Only
ROB Reorder
Buffer [Intel]
ROL Rotate Left
ROM Read Only
Memory
ROOM Real-Time
Object-Oriented Modeling
ROP Raster
Operation + RISC Operation
ROR Rotate Right
ROS Read-Only
Storage [IBM]
ROT Running
Object Table
RPC Remote
Procedure Call
RPG Report
Program Generator (Programming Language)
RPL Resident
Programming Language +
Requested
Privilege Level
RPN Real Page
Number
RPRINTER Remote
Printer [NetWare]
RPPROM
Reprogrammable PROM
RPT Repeat
RPQ Request for
Price Quotation
RQBE Relational Query
By Example [Fox Pro]
RR Real Reality
RS Radio Shack
+
Recommended
Standard (as in RS-232) [EIA] +
Record
Separator + Request to Send
RSA129 (129 digit
cryptographic security number named after
its
inventors: Drs. Ronald L. Rivest, Adi Shamir and
Leonard M.
Adelman)
RSAC Recreational
Software Advisory Council
RSCS Remote
Spooling Communications System
RSD Route Server
Daemon
RSH Remote Shell
RSL
Request-and-Status Link
RSP Required
Space Character
RST Reset +
Restart
RSTS Resource
Sharing Time Sharing [Digital]
RSX 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
RTDM Real-Time
Data Migration
RTEL Reverse
Telnet [Internet]
RTF Rich Text
Format
RTL Register
Transfer Language/Level +
Resistor
Transistor Logic + Right-To-Left +
Run Time Library
RTM Response
Time Monitor + Runtime Manager [Borland]
RTMP Routing
Table Maintenance Protocol
RTOS Real-Time
Operating System
RTP Rapid
Transport Protocol + Real-Time Protocol
RTS Remote
Takeover System + Request To Send
RTTI Runtime Type
Information
RTTY Radio
Teletypewriter (Communications)
RTV Real Time
Video
RVA Relative
Virtual Address
RVI Reverse
Interrupt
R/W Read/Write
RWM Read-Write
Memory
RX Receiver
RXD Receive Data
S
SA Selective
Availability
SAA Systems
Application Architecture [IBM]
SADL Synchronous
Data Link Control [Racal-Vadic]
SAINT * Symbolic
Automatic Integrator
SAL Shift
Arithmetic Left
SAM Serial
Access Memory + Sequential Access Method +
Single
Application Mode [Microsoft]
SANE Standare
Apple Numeric Environment
SAP Second Audio
Program + Service Access
Point [DEC]
+ Service Advertising Protocol
SAP * Symbolic
Assembly Program
SAPI Speech
Application Program Interface [Microsoft]
SAR Shift
Arithmetic Right +
Successive
Approximation Register +
Synthetic
Aperature Radar
SAS Sales
Accounting System + Single Attached Station +
Single Audio System + Statistical Analysis
System
SASI Shugert
Associates System Interface (SCSI originated
from SASI)
SATAN Security
Administrator Tool for Analyzing Networks
.SAV Saved (file
name extension)
SAVDM Single Application
VDM
SB Sound
Blaster [Creative Labs] + Sound Board
SBA Scene
Balance Algorithms [Kodak]
SBB Subtract
With Borrow
SBC Single-Board
Computer
SBCS Single-Byte
Character Set
SBI Sound
Blaster Instrument
.SBR Source Browser (file name extension) [Borland]
.SC Script (file
name extension)
SCADA Supervisory
Control and Data Aquisition
SCAM SCSI
Configuration Automatically
SCAS Scan String
SCB Subsystem
Control Block [IBM]
SCC Serial
Communications Controllers +
Serial
Controller Chip +
Synchronous
Channel Check [IBM]
SCCS Source Code
Control System
SCD Standard
Color Display
SCF System
Control Facility
SCI. Science
[USENET Newsgroup Category]
SCLM Softwre
Configuration and Library Management [IBM]
SCM ScreenCam
Format [Lotus] +
Software
Configuration Management + Station Class Mark
SCO Santa Cruz
Operation (Software Company)
SCOPE Simple
Communications Programming Enironment
[Hayes]
SCP Save Cursor
Position + Subsystem Control Port +
System
Control Program
SCR Silicon
Controlled Rectifier
.SCR Script (file
name extension)
SCRN Screen
(video display)
SCRS Scalable Cluster
of RISC Systems
SCSA Signal
Computing System Architecture [Dialogic]
SCSI Small
Computer Systems Interface
SD Send Data +
Super Density
SDA Software
Disk Array + Source Data Automation +
System
Display Architecture [Digital]
SDB Symbolic
Debugger [Unix]
SDD Software
Description Database [Internet]
SDF Space
Delimited File + Space Delimited Format
.SDF Standard
Data Format (file name extension)
SDI Selective
Dissemination of Information +
Single
Document Interface
Software
Development Interface [Mosaic]
SDK Software
Developer's Kit [Microsoft]
SDLC Synchronous
Data Link Control (protocol)
SDM System
Development Multitasking
SDMS SCSI Device
Management System [NCR]
SDN Software
Defined Network [AT&T]
SDNS Secure Data
Network Service
SDR Streaming
Data Request
SDRAM Synchronous
Dynamic Random Access Memory
SD-ROM Super
Density ROM
SDS Sysops
Distribution System
SDSL Single-Line
Digital Subscriber Line
SD_STB Streaming
Data Strobe [IBM]
SDV Switched
Digital Video [AT&T]
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)
SED Stream
Editor + Stream-Oriented Editor
SEG Segment
SEH Structured
Exception Handling
SEL Select
SEM Scanning
Electron Microscope +
Standard
Electronic Module
SEPP Secure
Encryption Payment Protocol
SER Serial
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 Smallest
Executable Unit
SF Sign Flag
SFQL Structured
Full-text Query Language
SFS System File
Server
SFT System Fault
Tolerance
SFX Sound
Effect(s)
SGEN Signal
Generator + System Generator
SGDT Store Global
Descriptor Table
SGI Silicon
Graphics, Inc.
SGM Shaded
Graphics Modeling
SGML Standard
Generalized Markup Language
SGR Set Graphics
Rendition
SGRAM Synchronous
Graphics RAM
S/H Sample and
Hold
SHA Secure Hash
Algorithm [NSA]
SHAR Shell
Archive
SHG Segmented
Hypergraphics
SHL Shift
Logical Left
SHR Shift
Logical Right
S-HTTP Secure Hypertext
Transfer Protocol
.SHW Show (file
name extension)
SI Shift-In +
Source Index + System Information
SIC Standard
Industrial Code
SID Security
Identifier + Serial Input Data +
Station
Identification [AT&T] +
Symbolic Interactive Debugger
SIDF System
Independent Data Format
SIDH System
Identification for Home Systems
SIDT Store
Interrupt Descriptor Table
SIFT Stanford
Information Filtering Tool
SIG Special
Interest Group
SIGCAT Special
Interest Group on CD-ROM Applications
and
Technology
SIM Simulator
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 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
SI/SO Serial
In/Serial Out + Shift In/Shift Out
SIT Special
Information Tones
.SIT Stuff-It
(compressed file name extension) [Macintosh]
SKU# Stock
Keeping Unit Number
SLDT Store Local Descriptor Table
SLED Single Large
Expensive Disk
SLIP Serial Line
Interface Protocol
SLM Spatial
Light Modulator
SLMR Silly Little
Modem Reader
SLOSH Sea, Lake
and Overland Surge from Hurricane (program)
SLSI Super
Large-Scale Integration
SLSS Systems
Library Subscription Service [IBM]
SLU Spoken
Language Understanding
SM Set Mode +
Shared Memory
SMART
Self-Monitoring Analysis and Reporting Technology
SMB Server
Message Block (protocol) [MII]
SMD Surface
Mounted Device
SMDS Switched
Multimedia/Multi-Megabit Data Service
SMF System
Manager Facility [Compaq]
SMI System
Management Interrupt [Intel]
SMIF Standard
Mechanical Interface
SMIT System
Management Interface Tool [IBM]
SMK Software
Migration Kit [Microsoft]
SML Standard
Meta Language
SMM System
Mangement 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 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]
SND Sound
SNEWS Secure News
Server [Internet]
SNMP Simple
Network Management Protocol
SNOBOL String
Oriented Symbolic Language (Progamming Language)
SNP Serial
Number/Password [Omen Technology]
SNR
Signal-to-Noise Ratio
SOA Start Of
Authority
SOC System On a
Chip
SOC. Social
Issues [USENET Newsgroup Category]
SOCKS Socket
Secure (server) [Internet]
SODIMM Small
Outline DIMM
SOE Standard
Operating Environment
SOH Start of
Header
SOHO Small
Office/Home Office
SOL Simulation
Oriented Language
SOM Start of
Message + System Object Model [IBM]
SONET Synchronous
Optical Network
SOP 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 Software
Publishers Association
SPAN Space
Physics Analysis Network
SPARC Scalable
Processor Architecture
SPC Small
Peripheral Controller + Statistical Process Control
SPCL Spectrum
Cellular Corporation
SPEC Systems
Performance Evaluation Cooperative
SPF Shortest
Path First + System Programming Facility
SPI Service
Provider Interface + SCSI Parallel Interface
SPID Service
Profile/Provider Identifier
SPIKE Science
Planning Intelligent Knowledge-Based
Environment
[STScI]
SPIRES Stanford
Public Information Retrieval System
[Stanford
University]
SPL Spooler +
System Programming Language [HP]
.SPL Spell
Checker (file name extension)
SPM System
Performance Monitor [IBM]
SPOOL Simultaneous
Peripheral Operations On Line
SPOT Shared
Product Object Tree [IBM]
SPP Sequenced
Packet Protocol
SPPS Scalable
Power Parallel System [IBM]
SPR Special
Purpose Register + Statistical Pattern Recognition
SPREAD * Systems
Programming, Research, Engineering
and
Development [IBM]
SPS Standby
Power System
SPSS Statistical
Package for the Social Sciences
SPT Sectors Per
Track
SPX Sequenced
Packet Exchange [Novell]
SQ Squeezed
(files)
SQL/DS Structured
Query Language/Data System [IBM]
SQRT Square Root
SR Shift
Register
SRAM Shadow
Random Access Memory +
Static
Random Access Memory
SRB Source-Route
Bridge
.SRC Source (file
name extension)
SRD Screen
Reader System
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
SSA Serial
Storage Architecture
SSAP Source
Service Access Point
SSCP Systems
Service Control Point [IBM]
SSD Solid State
Disk
SSEC * Selective
Sequence Electronic Calculator [IBM]
SSGA System
Suppport Gate Array
SSI Single
System Image + Small Scale Integration
SSL Secure
Sockets Layer
SST Spread-Spectrum
Technology +
Systems
Services and Technology
STA Spanning
Tree Algorithm
STAR Self
Defining Text Archival
STB Strobe
STC Set Carry
Flag
STD Set
Direction Flag + Standard
STDA StreetTalk
Directory Assistance [Banyan]
STDAUX Standard
Auxillary
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
.STF Structured
File (file name extension) [Lotus Agenda]
STI Set
Interrupt Flag
S/TK Sectors Per
Track
STN Super-Twist
Nematic
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]
SVC Switched
Virtual Circuit
SVGA Super Video
Graphics Array
S-VHS Super VHS
SVM System
Virtual Machine [Microsoft]
SVR Server
SVR# System V
Release Number [AT&T]
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]
SWISH Simple Web
Indexing System for Humans
.SWP Swap (file
name extension)
.SYL Syllabus
(file name extension)
SYLK Symbolic
Link
.SYM Symbols
(file name extension)
.SYN Synonym
(file name extension)
SYNC Synchronous
SYS System
.SYS System
Configuration (file name extension) +
System
Device Driver (file name extension)
SYSGEN System
Generator
SYSLOG System Log
SYSMOD System
Modification
SYSOP System
Operator
SYSREQ System
Request
SZ Send ZModem [Unix]
T
TAD Telephone
Answering Device
TAP Telelocator
Alphanumeric Protoco
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
TASM Turbo
Assembler [Borland]
TAXI Transparent
Asynchronous Tranceiver/Receiver Interface
TB Terabyte
(1,024 gigabytes)
T/B Top and
Bottom
TBBS The Bread
Board System (BBS)
TBGA Tape Ball
Grid Array
.TBK Toolbook
(file name extension)
TBU Tape Backup
Unit
TC Test Control
+ Transmission Control
TCL Tool Command
Language
TCM
Trellis-Coded Modulation
TCP/IP Transmission
Control Protocol/Internet Protocol
TD Transmit
Data
TDD
Telecommunications Device for the Deaf
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 Telelocator
Data Protocol
TDSR Transmitter
Data Service Request
TDR Time Domain
Reflectometry
TE/2 Terminal
Emulator/2 [Oberon]
TEB Thread Environment Block
TEC Tokyo
Electronics Corporation
TED Tiny Editor
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
THD Total
Harmonic Distortion
.THD Thread (file
name extension)
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]
TID Target ID
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]
TIM Technical
Information Memo [Compaq]
TIP Terminal Interface Processor
TK/TK Track to
Track
TLA Three-Letter
Acronym
TLB Translation
Lookaside Buffer
TLI Transport
Layer Interface
TLU Table Lookup
.TLX Telex (file
name extension)
TM Trademark
TMP Temporary
TN Twisted
Nematic
TNC Terminal
Node Controller
TNO The
Netherlands Organization
ToC Table Of
Contents
TOD Time Of Day
TOP Technical
and Office Protocol
TPC
Transaction-Processing Performance Council
TPI Tracks Per
Inch
TPL Table
Producing Language
TPM Transactions
Per Minute
TPORT Twisted Pair
Port Transceiver [AT&T]
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
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
TSAPI Telephony
Services Application Program
Interface
[AT&T + Novell]
TSB Termination
Status Block
TSE The Semware
Editor
TSO Time Sharing
Option
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
Transistor-Transistor Logic
TTP
Thermal-Transfer Printing
TTS
Text-To-Speech + Transaction Tracking System
TTY Teletype
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
TWAIN Technology
Without Any Interesting Name
(connection
between application and scanner software)
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
UART Universal
Asynchronous Receiver/Transmitter
.UC2 Compressed
File (file name extension) [UltraCompressor]
UCL Universal
Communications Language
UCS Unicode
Conversion Support + Universal Character Set +
User
Coordinate System
UCT Universal
Coordinated Time
UDC User Defined
Commands
UDE Universal
Data Exchange
UDF User Defined
Functions
UDG User Defined
Gateway
UDP User
Datagram Protocol
UDT Uniform Data
Transfer
UFS Unix File
System
UG User Group
UI Unix
International + User Interface
UID User
Identifier
UIMS User
Interface Management System
UL Underwriters
Laboratories +
Unordered
List + Upload
ULA Uncommitted
Logic Array
ULN Universal
Link Negotiation
ULSI Ultra Large
Scale Integration
UMA Unified
Memory Architecture
UMB Upper Memory
Block [LIM/AST]
UNC Universal Naming Convention +
Uuencoded
Netnews Collator [Unix]
UNCOL Universal
Computed Oriented Language
UNI User-Network
Interface
UNICOM Universal
Integrated Communication (System)
UNICOS Universal
Compiler FORTRAN compatible
UNIVAC Universal
Automatic Computer
UNIX (AT&T
Bell Laboratories Operating System)
UNMA Unified
Network Management Architecture
UP Uniprocessor
UPC Universal
Product Code
UPG Upgrade
UPL User Program
Language
UPM Unix Programmer's Manual +
User Profile
Management [IBM]
UPS
Uninterruptible Power Supply +
Uninterruptible Power 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 Reciever/Transmitter
USB Universal
Serial Bus [Intel]
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
UTC Coordinated
Universal Time
UTI Universal
Text Interchange/Interface
UTP Unshielded
Twisted-Pair (cable)
UU
Uuencode/Uudecode
UUCP Unix-To-Unix
Copy Program
UUD UUDecoding
[Unix]
UUE UUEncoding
[Unix]
UUI User-To-User
Information [AT&T]
UV Ultraviolet
V
VA Virtual
Address
VAD Value Added
Dealer
VADD Value Added
Disk Driver
VADSL
Very-High-Rate Asymmetric Digital Subscriber Line
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
vBNS Very High
Speed Backbone Network Service [MCI + NSF]
VBR Variable Bit
Rate
VBRUN Visual Basic
Runtime
.VBX Visual Basic
Extension (file name extension)
VCC Virtual
Channel Connection
VCD Virtual
Communications Driver
VCL Visual
Component Library
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
VDISK Virtual Disk
VDM Virtual DOS
Machine [IBM]
VDMAD Virtual
Direct Memory Access Device [Microsoft]
VDS Virtual DMA
Services
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
VER Verify +
Version
VERONICA Very Easy
Rodent-Oriented Net-Wide Index to
Computer
Archives [Internet]
VERR Verify Read
Access
VERW Verify Write
Access
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
VHS Very High
Speed + Video Home System +
Virtual Host
Storage
VHSIC Very High
Speed Integrated Circuit
VI Visual
Interactive (editor) [UNIX]
VIE Virtual
Information Environment
VIF Virtual
Interface + Virtual Interrupt Flag
VIM Vendor
Independent Mail +
Vendor
Independent Messaging + Video Interface Module
VIO Video
Input/Output + Virtual Input/Output
VINES Virtual
Networking System [Banyan]
ViP Visual
Programming [Lotus]
VIP Variable
Information Processing +
Video
Information Provider +
Virtual
Interrupt Pending
VIPER Verifiable
Integrated Processor for
Enhanced
Reliability
VIS Video
Information System [Tandy] +
Voice
Information System
VJ HEADER Van Jacobsen Header (compression) [Unix]
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
VME Virtual
Memory Environment
VMM Virtual
Machine/Memory Manager
VMOS Vertical MOS
VMP Virtual
Modem Protocol
VMS Virtual
Memory System + Voice Message System
VMT Virtual
Memory Technique
VNA Virtual
Network Architecture
VOC Creative
Voice (format) [Sound Blaster]
VOD Video On
Demand
VOL Volume
VOM
Volt-Ohm-Milliammeter
VOR Visions Of
Reality
VOS Verbal/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 Visual
Programming Environment
VPL Virtual
Programming Language
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
VRE Voltage
Regulated Extended
VRML Virtual Reality
Modeling Language
(originally
named Virtual Reality Markup Language)
VROOMM Virtual
Real-time Object Oriented
Memory
Manager [Borland]
.VRS WordPerfect
Graphics Driver (file name extension)
VRT Voltage
Regulation Technology [Intel]
VRU Voice
Response Unit
VS Virtual
Storage
VSAM Virtual
Storage Access Method
VSAT Very Small
Aperture Terminal
VSE Virtual
Storage Extended
VSF Vertical
Scanning Frequency
VSIO Virtual
Serial Input Output
VSLI Very Large
Scale Integration
VSM Virtual
Shared Memory + Virtual Storage Management +
Visual
System Management [IBM]
VSN Volume
Serial Number
VSOS Virtual
Storage Operating System
VSYNC Vertical
Sync
VT Vertical Tab
VTAM Virtual
Telecommunications Access Method [IBM]
VUI Video User
Interface
VUP VAX Unit of
Performance
VMS Virtual
Memory System + Voice Message System
VWB Visual
WorkBench [Microsoft]
VxD Virtual
Extended Driver [Microsoft]
.VXD Virtual
Device (file name extension) [Microsoft]
W
W/ With
W3 (see WWW)
W3A World Wide
Web Applets
W3C World Wide
Web Consortium
W4
What-Works-With-What
WABI Windows
Application Binary Interface [SunSoft]
WAIS Wide Area
Information Server
WAITS Wide Area
Information Transfer System
WAN Wide Area
Network
WATS Wide Area
Telecommunications Service
.WAV Waveform
Audio (file name extension)
WC Word Count
WCS World Coordinate System
WDL Windows
Driver Library [Microsoft]
WDRAM Windows
Dynamic Random Access Memory
WELL Whole Earth
'Lectronic Link (BBS)
WFW Windows For
Workgroups [Microsoft]
WGS Work Group
System
WHAM Waveform Hold
and Modify [Microsoft]
WHC Workstation
Host Connection
WINE Windows
Emulator
WINForum Wireless
Information Networks Forum
WINS
Windows-Internet Naming Service [Microsoft]
WINSOCK Windows Open
Systems Architecture [Microsoft] +
Windows Sockets
WINWORD Word For
Windows [Microsoft]
WISE WordPerfect
Information System Environment
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
WMC Workflow
Management Coalition
.WMF Windows
Metafile Format (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]
WP WordPerfect
+ Word Processing + Write Protected
.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
.WRI Write (file
name extension)
WS WordStar +
Workstation
WT Write
Through
WWIS World Wide
Information System [Internet]
WWW World-Wide
Web [Internet]
WYSBYGI What You See
Before You Get It
WYSIWYG What You See
Is What You Get
X
XA Extended
Architecture + Extended Attribute
XAPIA X.400
Application Program Interface Association
X2B Hexadecimal
to Binary [REXX]
.XBM X-Windows
Bitmaps (file name extension) (black and white)
.XPM X-Windows
Pixelmaps (file name extension) (color)
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
XGA Extended
Graphics Array [IBM]
XID Exchange
Identifier
XIOS Extended
Input/Output System
XLAT Translate
XLM Excel Macro
Language [Microsoft]
XMIT Transmit
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)
XPRM Xerox Print
Resources Manager [Xerox]
XRT Extensions
for Real-Time
XSMD Extended
Storage Module Drive (interface)
XTAL Crystal
XTCLK External
Transmit Clock
Y
YAM Yet Another
Modem [Omen Technology]
YAHOO Yet Another
Hierarchically Officious Oracle [Internet]
(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]
ZBR Zone Bit
Recording
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
Others
~ Tilde
* Wildcard
character (asterisk)
*.*
Star-Dot-Star (represents
Any file
name.Any file name extension)
.$$$ Temporary
File (file name extension)
286 80286
(microprocessor)
386 80386
(microprocessor)
3COM 3 Com
Corporation (The 3 Coms are
Computer,
Communications and Compatability)
3GL Third
Generation Language (procedural language)
486 80486
(microprocessor)
4GL Fourth
Generation Language (procedural language)
6DOF Six Degrees
Of Freedom
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