| Acronym | Definition |
|---|
| FMSS | Faculté de Médecine et des Sciences de la Santé (French: Faculty of Medicine and Health Sciences; Canada) |
| FMSS | Field Medical Service School (US DoD) |
| FMSS | Flash Media Streaming Server (Adobe) |
| FMSS | Flinders Medical Students' Society (Australia) |
| FMSS | Facility Management Software System (US NPS) |
| FMSS | Financial Management Systems Software |
| FMSS | Fasken Martineau Stringer Saul (law firm; UK) |
| FMSS | Fairfield Methodist Secondary School (Singapore) |
| FMSS | Full-Mission Shiphandling Simulator |
| FMSS | Field Maintenance Subsystem |
| FMSS | Field Medical Surveillance System |
| FMSS | Federal and Military Specifications and Standards |
| FMSS | Fly-away Message Switch System |
| FMSS | Frequency Modulation Subcarrier Service |
| FMSS | Fuzzy Multi-State System |