"A",
"B",
"C",
"D",
"E",
"F",
"G",
"H",
"I",
"J",
"K",
"L",
"M",
"N",
"O",
"P",
"Q",
"R",
"S",
"T",
"U",
"V",
"W",
"X",
"Y",
"Z"
Previous section of 'Ar' Acronyms and terms
| AS | - | Advanced Schottky [AS Logic Manufacturers] |
| ASC | - | AUTODIN Switching Center |
| ASCB | - | Avionics Standard Communications Bus |
| ASCC | - | Avionic Systems Standardization Committee |
| ASCII | - | American Standard Code for Information Interchange |
| ASHRAE | - | American Society of Heating, Refrigerating and Air-Conditioning Engineers |
| ASI | - | Actuator Sensor Interface [Sensor Bus] |
| ASI | - | Advanced Switching Interconnect [ASI Bus] |
| ASIC | - | Application-Specific Integrated Circuit [ASIC] |
| ASK | - | Amplitude-Shift Keying |
| ASME | - | American Society of Mechanical Engineers |
| ASN | - | abstract syntax |
| ASP | - | Aggregated Switch Procurement |
| ASP | - | adjunct service point |
| ASQ | - | American Society for Quality |
| ASR | - | automatic send and receive |
| ASR | - | airport surveillance radar [Radar Terms] |
| ASSE | - | American Society of Safety Engineers |
| ASSP | - | Application-Specific Standard Product |
| AST | - | Accelerated Stress Testing [Unit Test Acronyms] |
| AT | - | access tandem |
| ATA | - | Advanced Technology Attachment [PC Bus] |
| ATA | - | Analog Telephone Adapters |
| ATA | - | Air Transport Association of America |
| ATACS | - | Army Tactical Communications System |
| ATAPI | - | Advanced Technology Attachment Packet Interface |
| ATB | - | all trunks busy |
| ATCA | - | Advanced Telcom Computing Architecture |
| ATCRBS | - | air traffic control radar beacon system |
| ATCXO | - | analog temperature controlled crystal oscillator |
| ATDM | - | asynchronous time-division multiplexing |
| ATE | - | automatic test equipment |
| ATIS | - | Alliance for Telecommunications Industry Solutions |
| ATM | - | asynchronous transfer mode |
| ATP | - | Acceptance Test Plan |
| ATR | - | Air Transport Rack [ATR Manufacturers] |
| ATSC | - | Advanced Television Systems Committee |
| ATV | - | advanced television |
| au | - | astronomical unit |
| AUI | - | attachment unit interface [AUI Pinout] |
| AUTODIN | - | Automatic Digital Network |
| AUTOSEVOCOM | - | Automatic Secure Voice Communications Network |
| AUTOVON | - | Automatic Voice Network |
| AV | - | Audio/Visual |
| AVD | - | alternate voice/data |
| AWA | - | Aluminum Wire Armour [Cable] |
| AWG | - | American Wire Gauge |
| AWGN | - | additive white Gaussian noise |
| AZ | - | azimuth |
Next set of "B" Abbreviations and Acronyms
