| Abbreviation | Definition |
|---|---|
| FFI | Foot Function Index |
| FFW | Feet Fresh Water |
| FIM | Functional Independence Measure |
| FL | Feet Long |
| FL | Foot Lamberts |
| fl.oz. | fluid ounce |
| FLA | Full Load Amperage |
| FLH | Full Load Hours |
| FLOPS | FLoating-point Operations Per Second |
| FLOZ | Fluid Ounce |
| FLOZ | Fluid Ounces |
| FM | FemtoMeter |
| fm | fermi |
| FP | Foot Pounds |
| FPB | Frames Per Beat |
| FPF | Furlongs Per Fortnight |
| FPI | Flux changes Per Inch |
| FPS | Feet Per Second |
| FPS | Food Per Serving |
| FPS | Foot Pound Second |