| Abbreviation | Definition |
|---|---|
| FITT | Farmer Initiated Technology Transfer |
| FITU | Fire Instructor Training Unit |
| FIU | Force Intelligence Unit |
| FIU | Force Intelligence Unit or Football Intelligence Unit |
| FIV | Feline Immunodeficiency Virus |
| FIV | Fuel Isolation Valve |
| FJRM | Full Joint Range of Motion |
| FKB | Flight Display Keyboard |
| FKF | Flight Kits Facility |
| FL | Femur Length |
| FL | Folding Lip |
| FL | Forest Land |
| FL | Financial Loss |
| FLA | Future Large Aircraft |
| FLAMBE | Fire Locating And Monitoring Of Burning Emissions |
| FLAP | Flight Application Software |
| FLASH | Factual Lines About Submarine Hazards |
| FLC | Federal Library Committee |
| FLC | Forward Load Control |
| FLCA | Forward Load Control Assembly |
| FLEX COL | FLEXible COLlodion |
| FLIPL | Financial Liability Investigations and Property Loss |
| FLIR | Forward Looking Infrared Radiometer |
| FLKS | Fatty Liver And Kidney Syndrome |
| FLLK | Frustum Lifting Lug Kit |
| FLMC | Florida Labor Management Conference |
| FLO | Family Liaison Officer |
| FLOPS | Floating -Point Operation |
| FLOPS | Floating Point Operations Per Second |
| FLOWSIM | Traffic Flow Planning Simulation |
| FLP | Fuzzy Logic Professional |
| FLP | Fragment Length Polymorphism |
| FLPS | Flight Load Preparation System |
| FLR | Finger Length Ratio |
| FLS | Fellow of Linnaean Society |
| FLS | Fatty Liver Syndrome |
| FLSA | Fair Labor Standards Act |
| FLSC | Flexible Linear Shaped Charge |
| FM | Frequency Modulation |
| FM | Field Marshall |
| FM | Finance Minister |
| FM | Frequency Modulation; Field Marshal; Finance Minister |
| FM | Fire Marshall |
| FMA | Facilities Management Administrator |
| FMA | Failure Mode Analysis |
| FMA | First Mission Available |
| FMA | Financial Management and Accountability Act 1997 |
| FMA | Financial Management Assessment |
| FMAHTS | Flight Manifest and Hardware Tracking System |
| FMC | Food Machinery Corporation |