| Abbreviation | Definition |
|---|---|
| ADO | Airports District Office |
| ADP | Air Driven Pump |
| ADPM | Aircraft Deactivation Procedures Manual |
| ADR | Accident Data Recorder |
| ADR | Advisory Route |
| ADR | Air Data Reference |
| ADRS | Air Data Reference System |
| ADS | Air Data System |
| ADS | AMI Development System |
| ADS | Automatic Dependence Surveillance |
| ADS | Automatic Dependent Surveillance |
| ADS-B | Automatic Dependent Surveillance-Broadcast |
| ADT | Advanced Digital Trim |
| ADT | Approved Departure Time |
| ADTP | Airshow Data Transfer Program |
| ADU | Antenna Drive Unit |
| ADV | Advised; Advisory |
| AEA | Aircraft Electronics Association |
| AEAP | Atmospheric Effects of Aviation Project |
| AEAT | Aircraft Engineering and Aerospace Technology |