| Acronym | Definition |
|---|
| FJS | Fundação José Silveira (Portuguese: José Silveira Foundation; Brazil) |
| FJS | Franz Josef Strauß (German politician) |
| FJS | Fördeverein für Jugend und Sozialarbeit eV (German: Fjord Association for Youth and Social Work) |
| FJS | Fordingbridge Junior School (UK) |
| FJS | Freie Journalisten Schule (German: Free School of Journalism) |
| FJS | Fiches Juridiques Suisses (French: Swiss Legal Records; Switzerland) |
| FJS | Fiber Optic Jacket Stripper (tool) |
| FJS | French-Japanese Symposium on Medicinal and Fine Chemistry |
| FJS | Followers of Jesus School (Brooklyn, NY) |
| FJS | Former Junctional Site |