| Abbreviation | Definition |
|---|---|
| FHOTUS | First Husband Of The United States |
| FI | Fee Index |
| FI | Financial Intelligence |
| FI | First Initial |
| FI | Fundamental Issue |
| FIA | Federal Insurance Administration |
| FIB | Federal Investigatory Bureau |
| FIB | Fill In the Blank |
| FIC | Federal Information Center |
| FIC | John E. Fogarty International Center (NIH) |
| FICA | Federal Insurance Contribution Act |
| FIF | Family Inflationary Factor |
| FIFA | Federation Industry de Footbal Association |
| FIFO | first in first out |
| FIFRA | Federal Insecticide, Fungicide and Rodenticide Act |
| FILO | first in last out |
| FIMC | Federal Inter-agency Media Committee |
| FIMW | Federal Interagency Mitigation Workgroup |
| FINA | French Invade North America |
| FINCEN | Financial Crimes Enforcement Network |