| Acronym | Meaning |
| ASWIXS | Antisubmarine Warfare Information Exchange |
| ASWOC | Anti-submarine Warfare Operations Center |
| ATA | Auxiliary Ocean Tug (fleet Support) |
| ATC | Air Traffic Control |
| ATC | Mini-armored Troop Carrier (river/roadstead Craft) |
| ATCH | Attach/attachment |
| ATE | Automatic Test Equipment |
| ATF | Afloat Training Group |
| ATF | Fleet Ocean Tug (fleet Support) |
| ATIS | Advanced Technical Information System (navsea) |
| ATIS | Atherton Tool Integration Services (dec) |
| ATIS | Automatic Terminal Information Service |
| ATLAS | Abbreviated Test Language For Avionics Systems |
| ATMS | Automatic Text Management System |
| ATP | Acceptance Test Procedure |
| ATR | Air Transport Rack |
| ATS | Academic Trainer System |
| ATS | Salvage And Rescue Ship (fleet Support) |
| ATSS | Aviation Training Support System |
| ATT | Attitude |
| ATTCH | Attach/attachment |
| AU | Airborne Unit |
| AUD | Audio |
| AUF | Airborne Uninhabited Fighter |
| AUTO | Automatic |
| AUTOVON | Automatic Voice Network |
| AUX | Auxilliary |
| AV | Audio Visual |
| AV | Avionics |
| AVAIL | Available |
| AVB | Avionics Bulletin (tdc 55) |
| AVC | Avionics Change (tdc 54) |
| AVCCB | Air Vehicle Configuration Control Board |
| AVIM | Aviation Intermediate Maintenance |
| AVM | Guided Missile Ship |
| AVSS | Automated Voice Switching System Subsystem |
| AVT | Automatic Video Tracker |
| AVT | Auxiliary Aircraft Landing Training Ship (misc) |
| AVUM | Aviation Unit Maintenance |
| AWACS | Airborne Warning And Control System |
| AWAVS | Aviation Wide Angle Visual System |
| AWB | Airborne Weapon Bulletin (tdc 76) |
| AWC | Air Warfare Commander |
| AWC | Airborne Weapon Change (tdc 75) |
| AWCAP | Airborne Weapons Corrective Program |
| AWG | Airborne Weapons Group |
| AWM | Awaiting Maintenance |
| AWP | Awaiting Parts |
| AWSACS | All Weather Standoff Attack Control System |
| AWSI | Avionics-weapons System Integration |