| Acronym | Definition |
|---|
| FSTS | Faculté des Sciences et Techniques de Settat (French: Faculty of Science and Technology of Settat; Settat, Morocco) |
| FSTS | Fire Service Training School (Great Falls, MT) |
| FSTS | Fédération des Sociétés de Tir de la Sarine (French: Shooting Federation of Societies of Sarine; Switzerland) |
| FSTS | Federal Secure Telephone Service |
| FSTS | Formal Schools Travel Support (US Marine Corps) |
| FSTS | Fairfield/Suisun Transit System (California) |
| FSTS | Front Side Tail Slide (skateboarding) |
| FSTS | Flight Simulation Training System (US Army) |
| FSTS | Future Soldiers Training System (US Army) |