| Abbreviation | Definition |
|---|---|
| ABTS | All Belt To Seat |
| ABV | Air Bubble Vehicle |
| ABV | Assault Breacher Vehicle |
| ABVT | Alignment Balance Vibration Trainer |
| ABYC | American Boat and Yacht Council |
| AC | Accommodations Code |
| AC | Advisory Circular |
| AC | Air Conditioner |
| AC | Air Controller |
| AC | Air Cooled |
| AC | Air Cooling |
| AC | Aircraft Commander |
| AC | Airframe Change |
| AC | Alcohol Concentration |
| AC | All Conditions |
| AC | Asphalt Concrete |
| AC | Atlantic Crossing |
| AC | Auto Carrier |
| ACA | Advance Cargo Advice |
| ACA | Automotive Club Alliance |