| Abbreviation | Definition |
|---|---|
| FMSP | Foreign Military Sales Program |
| FMSS | Federal and Military Specifications and Standards |
| FMSS | Field Medical Surveillance System |
| FMSS | Future Medical Shelter System |
| FMTB | Field Medical Training Battalion |
| FMTFO | Fort McClellan Transition Force Operations |
| FMT-Net | Frequency Management Training Net |
| FMTV | Family of Medium Tactical Vehicles |
| FMU | Fuel Management Unit |
| FMV | Forces Motrices Valaisannes |
| FMVSS | Federal Motor Vehicle Safety Standards |
| FMWRC | Family and Morale, Welfare and Recreation Command |
| FN | Factory New |
| FN | Field Number |
| FN | Fighter Naval |
| FN | Force Network |
| FN | Foreign Nation |
| FNAF | First Nations Armed Forces |
| FNB | Failure Notification Board |
| FNBA | Flexible Narrow Beam Adapter |