| Abbreviation | Definition |
|---|---|
| FROSTY | Federation of Reform Ottawa Senior Temple Youth |
| FRS | Federation of Regulation Society |
| FSAN | Federation of Somali Associations in the Netherlands |
| FSAS | Federation of Scottish Aquarist Societies |
| FSCA | Federation of Syrian Chambers of Agriculture |
| FSCO | Federation of Straight Chiropractors and Organizations |
| FSDF | Frozen Storage and Distribution Federation |
| FSEF | Fédération Sud Est de Fléchettes |
| FSEP | Fédération Suisse des Ecoles Privées |
| FSFF | Fullblood Simmental Fleckvieh Federation |
| FSIN | Federation of Saskatchewan Indigenous Nations |
| FSIN | Federation of Sovereign Indigenous Nations |
| FSK | Federation of Shotokan Karate |
| FSMB | Federation of State Medical Boards |
| FSP | Federation Of Security Professionals |
| FSRI | Fédération des Socialistes Révolutionnaires Indépendants |
| FSSE | Federation Suisse des Sports Equestres |
| FSSS | Fédération de la santé et des services sociaux |
| FSSS | Fédération Sportive des Sourds de Suisse |
| FSW | Federation of Social Workers |