FIET
| Acronym | Definition |
|---|---|
| FIET | Festival International des Étoiles (French: International Festival of Stars; Congo) |
| FIET | Fellow of the Institution of Engineering and Technology (academic award; UK) |
| FIET | Facultad Internacional de Educación Teológica (Spanish: International Faculty of Theological Education; Argentina) |
| FIET | Forearm Ischemic Exercise Test (muscle test) |
| FIET | Federazione Italiana Energia Tachionica (Italian: Italian Federation of Tachyon Energy) |
| FIET | Furniture Industry Environment Trust (est. 1998; UK) |