| Acronym | Meaning |
| FTE | Full-Time Equivalent |
| FTE | Facilities, Terminals, and Equipment |
| FTE | Failure to Eject (firearms) |
| FTE | Failure to Extract (firearms) |
| FTE | Field Test Equipment (US DoD) |
| FTE | Firearms Training Elective (AAFC) |
| FTE | First Unit Equipped |
| FTE | Fitted Target Efficacy (luminaire performance; US Department of Energy) |
| FTE | Flight Technical Error |
| FTE | Flight Test Engineer |
| FTE | Flight Test Equipment |
| FTE | Florida's Turnpike Enterprise |
| FTE | Flux Transfer Event |
| FTE | Forwarding Time Expired (US Postal Service) |
| FTE | Full-Time Equivalency |
| FTE | Fully Taxable Equivalent/Equivalency |
| FTE | Functional-Technical Expert |