| Abbreviation | Definition |
|---|---|
| FLAAR | Foundation for Latin American Anthropological Research |
| FLAG | Farmers' Legal Action Group |
| FLC | Family Literacy Center |
| FLEC | Finding Lost and Escaped Cats |
| FLED | Finding Lost and Escaped Dogs |
| FLEF | Financial Literacy Education Fund |
| FLHP | Fannie Lou Hamer Project |
| FLOP | Friends Of Leash Optional Parks |
| FMB | Federation of Master Builders |
| FMC | Foundation for Medical Care |
| FMEP | Foundation for Middle East Peace |
| FMFM | Feed the Multitude Food Ministrys |
| FMHC | Feed My Hungry Children |
| FMI | Freedom Marathon, Inc. |
| FMRD | Family Movement For Realizing Democracy |
| FMSC | Feed My Starving Children |
| FMSF | False Memory Syndrome Foundation |
| FMSF | Financial Management Service Foundation |
| FNA | Florida Narcolepsy Association |
| FNAWS | Foundation For North American Wild Sheep |