| FACTOR | |
| FBA | Fulfillment By Amazon |
| FBS | Fasting Blood Sugar |
| FCC | Federal Communications Commission |
| FCE | Full Course Equivalent |
| FCR | First Call Resolution |
| FDAI | Flight Director Attitude Indicator |
| FEDERALISM | |
| FERTILE | |
| FFPE | Formalin-Fixed Paraffin-Embedded |
| FFS | For Fuck'S Sake |
| FICO | Fair Isaac Corporation |
| FIDELITY | |
| FIOS | Fiber Optic Service |
| FIPS | Federal Information Processing Standard |
| FN | Fingerprint Number / Function |
| FNB | Food And Nutrition Board |
| FNP | Family Nurse Practitioner |
| FOP | Fraternal Order Of Police |
| FORBEARANCE | |
| FSMA | Food Safety Modernisation Act |
| FTD | Frontotemporal Dementia / Failure To Deliver |
| FTX | Field Training Exercise |