| Abbreviation | Definition |
|---|---|
| FST | Forward Surgical Team |
| FSTC | Foreign Science and Technology Center |
| FSTD | Fire Support Test Directorate |
| FSTU | Field Skills Training Unit |
| FSU | Flight Station Unit |
| FSU | Former Soviet Union |
| FSU | Forward Support Unit |
| FSV | Future Scout Vehicle |
| FSV | uture Scout Vehicle |
| FSW | Feet of Sea Water |
| FSWD | Full Scale Weapons Delivery |
| FSX | Fire Support Execution |
| FT | Feet |
| FT | Flame Thrower |
| FT | Fort |
| FT | Fox Tango |
| FT | Future Tank |
| FTA | Feed Tray Assembly |
| FTA | Field Training Activity |
| FTA | Foam Test Apparatus |