| Abbreviation | Definition |
|---|---|
| AFRS | Airport Fire Rescue Service |
| AFS | Aerodrome Fire Service |
| AFS | Aeronautical Fixed Service |
| AFS | Automatic Flight System |
| AFSSP | Aircraft Fuel System Safety Program |
| AFTM | Air Traffic Flow Management |
| AFTN | Aeronautical Fixed Telecommunications Network |
| AFU | Air Freight Unit |
| AFVT | Aviation Forecast Verification Tool |
| AGAF | Aircraft Grade Aluminum Frame |
| AGAI | A Gustaitis' Aviation Institute |
| AGAI | Antanas Gustaitis Aviation Institute |
| AGAI | Antanas Gustaitis' Aviation Institute |
| AGATE | Advanced General Aviation Transport Experiment |
| AGATE | Advanced General Aviation Transport Experiments |
| AGB | Accessory Gearbox |
| AGCU | Auxiliary Generator Control Unit |
| AGFS | Aviation Gridded Forecast Systems |
| AGK | Aircraft General Knowledge |
| AGL | Above Ground Level |