AA: Automobile Association
AAA: American Automobile Association
AC: Air Conditioning
AC: Alternating Current
ACE: access control entry
ACK: acknowledge
ACLU: American Civil Liberties Union
ACPT: accept
AD: Anno Domini
ADN: Advanced Digital Network
ADSL: Asymmetric Digital Subscriber Line
AFAIR: As Far As I Recall
AGC: Automatic Gain Control
AGP: Accelerated Graphics Port
AGP: Advanced Graphics Port
AI: Artificial Intelligence
AIM: AOL Instant Messenger
Alt: Alternative
ALU: Arithmetic Logic Unit
AM: Amplitude Modulation
AMD: Advanced Micro Devices
amp: Ampere
amp: Amplifier
AOL: America Online
AoM: Age of Mythology
AP: Associated Press
APB: All Points Bulletin
API: Application Programming Interface
App: Application
ARPA: Advanced Research Projects Agency
ARPANET: Advanced Research Projects Agency Network
ASAP: as soon as possible
ASCII: American Standard Code for Information Interchange
ASIC: Application Specific Integrated Circuit
AT&T: American Telephone & Telegraph
ATA: Actual Time of Arrival
ATC: Air Traffic Control
ATV: All Terrain Vehicle
AV: Anti-Virus
AV: Audio/Video