| Abbreviation | Definition |
|---|---|
| FCN | Federation of Canadian Naturists |
| FCO | Fellowship of Christian Optometrists |
| FCRN | Food Climate Research Network |
| FCS | Family And Community Services |
| FCS | Farmers for Climate Solutions |
| FCSS | Family Counseling / Shelter Services |
| FCSS | Florida Council for the Social Studies |
| FCSS-MC | Family Counseling and Shelter Services of Monroe County |
| FCST | Florida Center for Survivors of Torture |
| FDA | Financial Divorce Association |
| FDC | Fathers Dot Com |
| FDC | Foundation for Development Co-operation |
| FDCA | Family Day Care Association |
| FDDS | First Downs for Downs Syndrome |
| FDE | Fundação para o Desenvolvimento da Educação |
| FDI | Fondo de Desarrollo de Innovacion (Innovation and Development Fund) |
| FDP | Federation of Deaf People |
| FDPA | Fiji Disabled People Association |
| FDPA | Foundation for the Development of Polish Agriculture |
| FDR | Furever Dachshund Rescue |