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IT Abbreviations & Acronyms: Comprehensive Glossary

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There are currently 128 acronyms in this directory beginning with the letter A.
A
A+
A Plus
AA
Modem Lights
AAA
Authentication, Authorization, and Accounting
AAR
Apple Authorized Reseller
AARP
Appletalk Address Resolution Protocol
AAUI
Apple Attachment Unit Interface
ABAP
Advanced Business Application Programming
ABB
Activity-Based Budgeting
ABBH
Average Bouncing Busy Hour
ABC
Activity-Based Costing
ABM
Activity-Based Management
ABP
Microsoft Exchange Address Book Policy
ACD
Automatic Call Distributor
ACF2 or CA-ACF2
Access Control Facility
ACH
Automated Clearing House
ACH fraud
Automated Clearing House Fraud
ACID
Atomicity, Consistency, Isolation, and Durability
ACL
Access Control List
ACM
Association For Computing Machinery
AD CS
Active Directory Certificate Services
AD Domain
Active Directory Domain
AD Forest
Active Directory Forest
AD Tree
Active Directory Tree
ADAT
Alesis Digital Audio Tape
ADC
Automated Data Collection or Analog-To-Digital Conversion
ADE
Qutomated Data Entry
ADF
Automatic Document Feed
ADFS
Active Directory Federation Service
ADO
Activex Data Objects
ADP
Automatic Data Processing
ADPCM
Adaptive Differential Pulse-Code Modulation
ADS
Alternate Data Stream
ADSI
Analog Display Services Interface
ADSL
Asymmetric Digital Subscriber Line
ADSM
Adstar Distributed Storage Management
AES
Advanced Encryption System
AFIS
Automated Fingerprint Identification System
AGP
Accelerated Graphics Port
AHA
Accelerated Hub Architecture
AI
Artificial Intelligence
AIBO
Artificial Intelligence Robot
AID
Automatic Identification
AIDC
Automatic Identification and Data Capture
AIFF
Audio Interchange File Format
AIM
Application Integration Middleware
AIMS
Agile Infrastructure For Manufactured Systems
AIN
Advanced Intelligent Network
AIT
Advanced Intelligent Tape
AIX
Advanced Interactive Executive
Ajax
Asynchronous Javascript and XML
ALU
Arithmetic Logic Units
AM
Asset Management
Amazon EC2
Amazon Elastic Compute Cloud
Amazon EMR
Amazon Elastic Mapreduce
Amazon FPS
Amazon Flexible Payments Service
Amazon S3
Amazon Simple Storage Service
AMD
Advanced Micro Devices
AMD-V
AMD Virtualization
AMI
Amazon Machine Image or Advanced Metering Infrastructure
ANQP
Access Network Query Protocol
ANSI
American National Standards Institute
AoE
ATA Over Ethernet
AOI
Automated Optical Inspection
AOP
Aspect-oriented Programming
AOSP
android Open Source Project
AP
Accounts Payable
Apache Hadoop YARN
Yet Another Resource Negotiator
APAR
Authorized Program Analysis Report
API
Application Programming Interface
APICS
American Production and Inventory Control Society
APIPA
Automatic Private IP Addressing
APL
A Programming Language
APM
Application Performance Monitoring
Apple VPP
Apple Volume Purchase Program
Apple WWDC
Apple Worldwide Developers Conference
APPN
Advanced Peer-To-Peer Networking
APQP
Advanced Product Quality Planning
APS
Advanced Planning and Scheduling
APT
Advanced Persistent Threat
AR
Accounts Receivable
ARAX
Asynchronous Ruby and XML
ARIN
American Registry Of Internet Numbers
Arista EOS
Arista Extensible Operating System
ARP
Address Resolution Protocol
ARPA
Advanced Research Projects Agency
ARPU
Average Revenue Per User or Average Revenue Per Unit
AS
Autonomous System
AS/400
IBM I-Series, AS/400E, E-Server I-Series/400
ASCII
American Standard Code for Information Interchange
ASD
Agile Software Development
ASE
Adaptive Server Enterprise
ASF
Apache Software Foundation
ASIC
Application-Specific Integrated Circuit
ASIO
Audio Stream Input/Output
ASLR
Address Space Layout Randomization
ASN
Advanced Shipping Notice
ASN.1
Abstract Syntax Notation One
ASP
Active Server Page
ASP+
Asp.Net
ASPI
Advanced SCSI Programming Interface
ASPI Driver
Advanced SCSI Programming Interface Driver
ASPIC
Application Service Provider Industry Consortium
ASQ
American Society For Quality
ASR
Automated Speech Recognition
ASRS
Automated Storage Retrieval Systems
ASSP
Application-Specific Standard Product
AST
Automated Storage Tiering
ASUG
Americas' Sap Users' Group
ATA
Analog Telephone Adapter
ATAPI
At Attachment Packet Interface
ATE
Automated Test Equipment
ATL
Active Template Library
ATM
Asynchronous Transfer Mode
ATO
Assemble To order
ATP
Advanced Technology Program
ATR
Automated Trouble Reporting
ATS
Applicant Tracking System
ATU-R
Adsl Terminal Unit - Remote
AU
Activation Unit
AUP
Acceptable Use Policy
AV
Audio/Video
AVA
Anonymous Video Analytics
AVI File
Audio Video Interleaved File
AVL
Approved Vendor List
AVX
Advanced Vector Extensions
AWG
American Wire Gauge
AWIS
Alexa Web Information Service
AWS
Amazon Web Services

A quick reference guide for Information Technology (IT) related acronyms and abbreviations.

As a service to IT personnel everywhere (and also for ourselves) we’ve compiled a comprehensive list of IT-related acronyms and abbreviations.

Acronyms can be pronounced as words, like NASA and UNESCO; as individual letters, like FBI, TNT, and ATM; or as both letters and words, like JPEG (pronounced JAY-peg).

Abbreviations formed from a string of initials and usually pronounced as individual letters are more specifically called initialisms or alphabetisms.

No matter how you refer to these IT-related terms, please use our quick reference guide or search TechTerms.com to help decode the world of IT abbreviations and acronyms.

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