| Abbreviation | Definition |
|---|---|
| FEU | Federation of Entertainment Unions |
| FFAW | Fisheries, Food, and Allied Workers Union |
| FFC | Fatherland Front Committee |
| FFCU | Family Financial Credit Union |
| FFCU | Family First Credit Union |
| FFCU | Feliciana Federal Credit Union |
| FFCU | Fergus Federal Credit Union |
| FFCU | Forward Financial Credit Union |
| FFCU | Frederiksted Federal Credit Union |
| FFCU | Freedom First Credit Union |
| FFCU | Friendly Federal Credit Union |
| FFDCU | Fresno Fire Dept Credit Union |
| FGAAC | Fédération Générale Autonome des Agents de Conduite (French: General Federation of Autonomous Agents Conduct; train driver union) |
| FGHC | Faculty Grievance Hearing Committee |
| FGSU | First Generation Student Union |
| FHCU | Financial Horizons Credit Union |
| FHCU | Florida Hospital Credit Union |
| FIM | Federation Internationale des Mineurs |
| FIM | Federation Internationale des Musiciens |
| FITU | Federation of Independent Trade Unions |