| Acronym | Meaning |
 | 3M | Maintenance And Material Management (MMM) |
| A/A | Air-to-air |
| A/C | Air Conditioner |
| A/C | Aircraft |
| A/D | Analog/digital |
| A/S | Airspeed |
| AAA | Anti-aircraft Artillery |
| AAA | Artifacts, Agents And Activities |
| AAAA | Army Aviation Association Of America |
| AAB | Aviation Armament Bulletin (tdc 57) |
| AAC | Aircraft Armament Change (tdc 56) |
| AAI | Aircraft Armament Inc (aai Corp Baltimore) |
| AALC | Amphibious Assault Landing Craft |
| AALCT | Amphibious Assault Landing Craft |
| AAR | Air-to Air Receive |
| AATR | Air-to-air Transmit/receive Mode |
| AAW | Anti-air Warfare |
| AAWBOT | Aviation Antisubmarine Warfare Basic Operator Trainer |
| ABC | Analog Backup Computer |
| ABEC | Analog Backup Engine Control |
| ABECL | Left Engine Abec |
| ABECR | Right Engine Abec |
| ABF | Advanced Beam Former (searchlight) |
| ABIT | Automatic Built-in Test |
| ABIU | Avionics Bay Interface Unit |
| ABL | Allocated Baseline |
| ABU | Analog Backup |
| AC | Alternating Current |
| AC | Armament Computer |
| ACADA | Advanced Chemical Agent Detector And Alarm |
| ACALS | Army Computer-aided Acquistion & Logistics Support |
| ACAS | Application Control Architecture Services |
| ACB | Aircrew Bulletin (tdc 67) |
| ACC | Accept |
| ACC | Aircrew Change (tdc 66) |
| ACC | American Communications Corp |
| ACCB | Aircraft Change Control Board |
| ACCE | Aircraft Change Control Board |
| ACCS | Advanced Communications Control System |
| ACE | Acquisition Career Enhancement |
| ACE | Aircraft Common Equipment |
| ACFT | Aircraft |
| ACI | Allocated Configuration Identification |
| ACK | Acknowledge |
| ACLS | Auto Carrier Landing System (an/spn-xx) |
| ACMS | Air Combat Maneuvering System |
| ACMS | Air Combat Maneuvering Simulator |
| ACMT | Automated Configuration Management Tool |
| ACN | Advance Change Notice |
| ACO | Administrative Contracting Officer |
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