| Abbreviation | Definition |
|---|---|
| ABT | Air-Breathing Target |
| ABT | Armored Battle Tank |
| ABTP | Watervliet Arsenal Business and Technology Partnership |
| ABU | Advance Base Unit |
| ABU | After Body Unit |
| ABU | Airman Battle Uniform |
| ABU | Amphibious Beach Unit |
| ABU | Analog Back- Up |
| ABY | After Battle Of Yavin |
| ABY | After The Battle Of Yavin |
| AC | Acquisition cost |
| AC | Active Component |
| AC | Air Cadet |
| AC | Air Cavalry |
| AC | Air Commander |
| AC | Aircraft |
| AC | Aircraft Carrier |
| AC | All Clear |
| AC | Allied Committee |
| AC | Analyst Console |