| Abbreviation | Definition |
|---|---|
| FTS | File Transfer Service |
| FTS | File Transfer Services |
| FTS | Flying Training School |
| FTS | Full Time Soldier |
| FTS | Full Time Support |
| FTS | Full-Time Support |
| FTSCLANT | Fleet Technical Support Center Atlantic |
| FTSTDA | Full Time Support TDA |
| FTT | Field Tactical Trainer |
| FTT | Functional Threat Test |
| FTTD | Full Time Training Duty |
| FTU | Fat, Tired, Useless |
| FTU | Field Training Unit |
| FTU | Fitness Training Unit |
| FTU | Fleet Training Unit |
| FTU | Freight Terminal Unit |
| FTUS | Full Time Unit Support System |
| FTW | Feel The Wrath |
| FTW | Fight To Win |
| FTWS | Fused Thermal Weapon Sight |