| Abbreviation | Definition |
|---|---|
| FS | Friends School |
| FSA | Forest School Association |
| FSAM | Fulton Science Academy Middle School |
| FSAP | Faculty and Staff Assistance Program |
| FSAR | Foreign Student Advisor's Report |
| FSAS | Fairfield Suisun Adult School |
| FSBT | Forbes School of Business Technology |
| FSCA | Florida School Counselor Association |
| FSCP | Family School and Community Partnerships |
| FSD | Ferndale School District |
| FSD | Fullerton School District |
| FSEC | Felician School for Exceptional Children |
| FSES | Factory Shoals Elementary School |
| FSES | Freedom Shores Elementary School |
| FSG | Fukushima School Group |
| FSHS | Fairfax Senior High School |
| FSHS | Fairmont Senior High School |
| FSHS | Fargo South High School |
| FSHS | Fengshan Senior High School |
| FSHS | Fort Scott High School |