 Federal Insurance Administration | Government |
| Fellow of the Institute of Actuaries | Business |
| Fiat | Organizations |
| Flow Injection Analysis | Science |
| Factory Insurance Association | Business |
| Financial Inventory Accounting | Technology |
| Full Interest Admitted | Business |
| Fiberoptic Industry Association | Technology |
| Forest Inventory and Analysis | Government |
| Freedom of Information Act | Science |
| Freund's Incomplete Adjuvant | Medical |
| Functional Interoperability Architecture | Military |
| Facilities Inventory Assessment | Common |
| Feline Infectious Anaemia | Common |
| Feline Infectious Anemia | Medical |
| Fiat s.p.A. | Organizations |
| Field Information Agency | Common |
| Field Interferometer Alignment | Science |
| Field-Induced Anisotropy | Common |
| File Integrity Assessment | Technology |