| FMSS | Facility Maintenance Software System 
| Others |
| FMSS | Facility Management Software System
| Others |
| FMSS | Fairfield Methodist School Secondary
| Others |
| FMSS | Family Management Style Survey
| Others |
| FMSS | Fast Mode Stationary Shock
| Others |
| FMSS | Federal and Military Specifications and Standards
| Others |
| FMSS | Fermi Mass Storage System
| Others |
| FMSS | Fermilab Mass Storage System
| Others |
| FMSS | Field Medical Service School
| Others |
| FMSS | Field Medical Surveillance System
| Others |
| FMSS | Financial Management Software System
| Others |
| FMSS | Financial Management Support System
| Others |
| FMSS | Financial Management Systems Software
| Others |
| FMSS | First Maritime Shared Services
| Others |
| FMSS | Five Minute Speech Sample
| Others |
| FMSS | Flash Media Streaming Server
| Others |
| FMSS | Fletcher's Meadow Secondary School
| Others |
| FMSS | Flexible Manufacturing Simulation System
| Others |
| FMSS | Flexible Mobile Service Steering
| Others |
| FMSS | Food Marketing Support Services
| Others |
| FMSS | Force Measurement Suspension System
| Others |
| FMSS | Functional Medicine Success Summit
| Others |
| FMSS | FUSRAP Maywood Superfund Site
| Others |
| FMSS | Future Medical Shelter System
| Others |