| Abbreviation | Definition |
|---|---|
| FSA | Families Supporting Adoption |
| FSA | Florida Society of Anesthesiologists |
| FSAE | Florida Society of Association Executives |
| FSAE | Formula Society of Automotive Engineers |
| FSAF | Foundation for Sustainable Agriculture and Forestry |
| FSAM | Florida Society of Addiction Medicine |
| FSAP | Florida State Association of Parliamentarians |
| FSAR | Foundation for Spiritual Awareness Research |
| FSAS | Fort Smith Animal Society |
| FSBM | For Sale By Member |
| FSC | Frenchtown Senior Center |
| FSCR | Friends of the Santa Clara River |
| FSEEE | Forest Service Employees for Environmental Ethics |
| FSG | Florida Society of Goldsmiths |
| FSIF | Family Service Foundation, Inc. |
| FSL | Food, Security, and Livelihood |
| FSMB | Federation of State Medical Boards |
| FSO | Flag Service Organization |
| FSO | FlightSimulation.org |
| FSPR | Friends of the San Pedro River |