Computer has become fundamental need of our life. As in today’s life we became a good for nothing if we do not how to operate a computer. Isn’t it strange? For we all have to remember this fact. For operating this computer system we have to know some rules and to understand these rules we have to know some abbreviations as well. Today I’m going to give you all the abbreviations that we need to operate a computer perfectly. Now I’m givind the abbreviations from of  A only.


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

ABEND     Abnormal End

ABI       Application Binary Interface

ABIOS     Advanced BIOS

ABIST     Automatic Built-In Self-Test

ABLE      Adaptive Battery Life Extender

ABR       Available Bit Rate

ABRS      Automated Book Request System

ABS       Absolute

ABT       Abort

ABTS      ASCII Block Terminal Services

AC        Autocheck + Automatic Computer + Alternating Current

ACC       Accumulator

ACDI      Asynchronous Communications Device Interface


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 Mach

ACMS      Application Control Management System

ACP       Ancillary Control Program + Auxillary Control Process

ACROSS    Automated Cargo Release and Operations Service System


ACTS      Automated Computer Time Service

ACTT      Advanced Communication and Time 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


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

ADP       Automatic Data Processing

ADPCM     Adaptive Differential Pulse Code Modulation

ADR       Address


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

AFP       Appletalk Filing Protocol

AFS       Andrew File System

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

ALIBI     Adaptive Location of Internetworked Bases  of Information

ALINK     Active Link

ALIWEB    Archie Like Indexing in the Web

ALN       Asynchronous Learning Network

ALR       Advanced Logic Research, Inc.

ALT       Alternate (mode)

ALT.      Alternate lifestyle

ALU       Arithmetic Logic Unit

AMANDDA   Automated Messaging and Directory Assistance


AMI       American Megatrends, Inc.

AMMA      Advanced Memory Management Architecture

AMPS      Advanced Mobile Phone Service

ANCOVA    Analysis of Covariance

ANDF      Architecture-Neutral Distribution Format

ANI       Automatic Number Identification

.ANI      Animated Cursor

ANN       Artificial Neural Network

.ANN      Annotations

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


APAR      Authorized Program Analysis Report

APAREN    Address Parity Enable

APCUG     Association of PC User Groups

API       Application Program Interface

APIC      Advanced Programmable Interrupt Controller

APIS      Advanced Passenger Information System

APL       A Programming Language

APM       Advanced Power Management

.APP      Application

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


APSE      ADA Programming Support Environment


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


ASP       Association of Shareware Professionals

ASPI      Advanced SCSI Programming Interface [Adaptec]

ASPS      Advanced Signal Processing System


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)


ATPS      AppleTalk Printing Services

ATR       Automatic Terminal Recognition

ATS       Administrative Terminal System + Apple Terminal Services

AT&T      American Telephone and Telegraph

ATTN      Attention

ATTRIB    Attribute


.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

AV        Audio/Video + Audiovisual + Authenticity Verification

AVA       Audio Visual Authoring

AVG       Average

AVI       Audio Visual Interleave

AWG       American Wire Gage


AWS       Advanced Workstations and Systems

AX        Architecture Extended + Automatic Transmission


Hope you all will learn it and don’t get scared ok. To be continued…