| Abbreviation | Definition |
|---|---|
| FITH | Fire In The Head |
| FITH | Fire In The Hole |
| FITOW | Further Improved TOW |
| FITREP | Fitness Report |
| FITS | Furlough In To Service |
| FITSS | FAAD ( Forward Area Air Defense) Integrated Test Support System |
| FITT | Families In Transition Team |
| FITT | Frequency Intensity Time And Type |
| FITU | Fixed-wing Instructor Training Unit |
| FIV | First Intervention Vehicle |
| FIW | French and Indian War |
| FIWC | Fleet Information Warfare Center |
| FIXe | Navigational Fix Error |
| FJSNA | Foreign Joint Services NCO (Non-Commissioned Officers) Association |
| FKDM | Fort Knox Supplemental Material |
| FL | AFATDS Lightweight Computer Unit |
| FL | Flying Leads |
| FL | Force Level |
| FL | Fort Lee |
| FL | Fort Lewis |