| Abbreviation | Definition |
|---|---|
| ASAP | Automatic Shipment Advantage Program |
| ASAP | Aviation Safety Action Partnership |
| ASAP | Aviation Safety Action Program |
| ASAS | Airborne Separation Assurance System |
| ASAS | Aviation Safety Analysis System |
| ASAT | All Season All Terrain |
| ASC | Actuated Signal Control |
| ASC | Adaptive Speed Control |
| ASC | American Service Center |
| ASC | Office of System Capacity and Requirements |
| ASCE | American Society of Civil Engineers |
| ASCP | Aviation System Capacity Plan |
| ASCWG | Actuated Signal Control Working Group |
| ASD | Aircraft Situation Display |
| ASD | Allowable Stress Design |
| ASD | Azimuth Stern Drive |
| ASDA | Accelerate - Stop Distance Available |
| ASDE | Airport Surface Detection Equipment |
| ASE | Automated Speed Enforcement |
| ASE | NAS System Engineering Service |