| Abbreviation | Definition |
|---|---|
| FIE | Force Internal Execution |
| FIE | Füüsilisest Isikust Ettevõtja (Sole Proprietor in Estonian) |
| FIFRA | Federal Insecticide Fungicide And Rodenticide Act |
| FILE | Friends of Immigration Law Enforcement |
| FIN | Firearms Identification Number |
| FINE | Freekin Ignorant Neanderthal Enforcement |
| FIO | Federal Insurance Office |
| FIP | Firearms Interest Police |
| FIP | Firearms Interest to Police |
| FIR | First Investigation Report |
| FIRE | Fingerprint Identify Report And Enforce |
| FIRE | Forensic and Incident Response Environment |
| FIREL | Finance Insurance Real Estate and Law |
| FIRPTA | Foreign Investment Real Property Tax Act |
| FIRREA | Financial Institutions Reform Recovery and Enforcement Act |
| FIRST | Firearm Instruction and Responsibility Safety Training |
| FIRST | Firearm Instruction Responsibility and Safety Training |
| FIST | File, Inform, Settle, or Trial |
| FIT | Females In Trouble |
| FITE | Fraud and Identity Theft Enforcement |