| Abbreviation | Definition |
|---|---|
| FL | Forward Link |
| FLA | Form of Living Alien |
| FLA | Future Large Aircraft |
| FLAP | FLight APplication software |
| FLC | Federal Library Committee |
| FLC | Forward Load Control |
| FLCA | Forward Load Control Assembly |
| FLD | FieLD |
| FLEM | Flyby-Landing Excursion Mode |
| FLEX | FLEXible |
| FLG | FLaG |
| FLG | FLanGe |
| FLLK | Frustum Lifting Lug Kit |
| FLMC | Florida Labor Management Conference |
| FLMECH | FLuid MECHanical |
| FLN | Fuel LiNe |
| FLORAB | Horse, cat, jobs |
| FLOT | FLOTation |
| FLP | FLaP |
| FLPS | Flight Load Preparation System |