| Acronym | Meaning |
 | APSE | Ada Program Support Environment |
| APU | Auxiliary Power Unit |
| AQP | Airworthiness Qualification Plan |
| AR | Repair Ship (material Support) |
| ARBS | Angle Rate Bombing Set |
| ARC | Airborne Radio Communications |
| ARC | Cable Repairing Ship (misc) |
| ARCS | Automated Reusable Components System |
| ARD | Arinc And Discrete Circuit Card |
| ARD | Auxiliary Repair Dry Dock (non Self-propelled) |
| ARDM | Medium Auxiliary Repair Dry Dock (non Self-propelled) |
| ARH | Arli-radiation Homer |
| ARINC | Aeronautical Radio Inc |
| ARM | Anti Radiation Missile |
| ARMT | Armament |
| ARN | Aeronautical Radio Navigation |
| ARPS | Advanced Radar Processing System |
| ARS | Aerial Refueling Store |
| AS | Airspeed |
| AS | Submarine Tender (material Support) |
| ASAC | Anti-submarine Air Controller |
| ASB | Airborne Software Bulletin (tdc 94) |
| ASC | Airborne Sofware Change (tdc 93) |
| ASCII | American Standard Computer Information Interchange |
| ASD | Assistant Secretary Of Defense |
| ASDS | Airborne Serial Data System |
| ASE | Aircraft Survivability Equipment |
| ASEMICAP | Air Systems Emi Corrective Action |
| ASG | Aeronautical Standards Group |
| ASI&CS | Acoustic Sensor Integration And Control Sys |
| ASIS | Ada Semantic Interface Specification |
| ASIS | Anti Submarine Information System |
| ASITS | Adaptable Surface Interface Units |
| ASIU | Aircraft System Interface Unit |
| ASL | Above Sea Level |
| ASM | Actuator Signal Management |
| ASN | Assistant Secretary Of The Navy |
| ASO | Aviation Supply Office (philadelphia) |
| ASPJ | Airborne Self-protection Jammer (alq-165) |
| ASPK | Accompanying Spare Parts Kit |
| ASR | Submarine Rescue Ship (fleet Support) |
| ASROC | Anti-submarine Rocket (launch Sys) |
| ASSET | Asset Source For Software Engineering Technology |
| ASSY | Assembly |
| AST | Aircraft System Trainer |
| ASTAB | Auto Status Board |
| ASTM | American Society For Testing And Materials |
| ASU/STWCS | Anti Surface/strike Warfare Control System |
| ASW | Anti-submarine Warfare |
| ASWCSI | Antisubmarine Warfare Combat System (mk 116, Mod 5) |
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