| Abbreviation | Definition |
|---|---|
| ATCT | Aviation Training Center of Tunisia |
| ATD | Actual Time of Departure |
| ATDS | Airborne Tactical Data System |
| ATE | Automatic Test Equipment |
| ATEC | Aviation Technician Education Council |
| ATIA | Air Traffic Information Access |
| ATIL | Aviation Training International Limited |
| ATIL | Aviation Training International Ltd |
| ATIMS | Air Traffic & Information Management System |
| ATIO | Aviation Technology Integration and Operations |
| ATIS | Automatic Terminal Information Service |
| ATK | Aviation Turbine Kerosene |
| ATLAS | Abbreviated Test Language for All Systems |
| ATM | Air Traffic Management |
| ATM | Air traffic Movement |
| ATMAC | Air Traffic Management Advisory Committee |
| ATMES | Air Traffic Management Electronic Services |
| ATN | Aeronautical Telecommunications Network |
| ATN | The Aviation Training Network |
| ATO | Aborted Take-Off |