| Abbreviation | Definition |
|---|---|
| FA | Foreign Agent |
| FA | Form Application |
| FA | Forward Array |
| FA | Frankford Arsenal |
| FA | Freeboard Aft |
| FA | Freedom Arms |
| FA | From Arpanet |
| FA | Fuerza Armada |
| FA | Full Armor |
| FA | Functional Area |
| FA | Fusil Automatique |
| FA-1 | Functional Area 1 |
| FA-2 | Functional Area 2 |
| FAA | Federal Aviation Administration |
| FAA | Fuerza Aérea Argentina(Argentine Air Force) |
| FAA | Functional Area Assessment |
| FAAD | Forward Area Air Defense |
| FAADC2 | Forward Area Air Defense Command and Control |
| FAADC2I | Forward Area Air Defense Command, Control, and Intelligence |
| FAADC3I | Forward Area Air Defense Command, Control, Communications, and Intelligence |