| Acronym | Definition |
|---|
| FET | Field-Effect Transistor |
| FET | Federal Excise Tax |
| FET | Field Effect Transistor |
| FET | Future and Emerging Technologies |
| FET | Further Education and Training (RSA) |
| FET | Frozen Embryo Transfer (fertility treatment) |
| FET | Fair and Equitable Treatment (Bilateral Investment Treaty; international law) |
| FET | Flaming Eternity (Yu-Gi-Oh! Cards) |
| FET | Fast Ethernet Transceiver |
| FET | Further-Eastern European Time (time zone) |
| FET | Flash Emulation Tool (various companies) |
| FET | Far East Time |
| FET | Fast Ethernet |
| FET | Fedora Engineering Team |
| FET | Female Engagement Team (US Marine Corps) |
| FET | Financial Economic Theory (Society of Actuaries) |
| FET | Falange Española Tradicionalista (Spanish political party) |
| FET | Field Evaluation Trial |
| FET | Forensic Evidence Technician (law enforcement) |
| FET | Freunde Elektronischer Tanzmusik (German: Friends Electric Dance Music) |
| FET | Fédération Espérantiste du Travail (French: Esperanto Federation of Labor) |
| FET | France Express Topo (French stoneware company) |
| FET | Foundation on Economic Trends |
| FET | Flight Elapsed Time |
| FET | Fighter Engine Team |
| FET | Forsvarets Efterretningstjeneste (Danish Defense Intelligence Agency) |
| FET | Forced Expiratory Technique (chest physiotherapy) |
| FET | France Européenne Télécoms (French: France European Telecoms) |
| FET | Familial Essential Tremor |
| FET | FarEastTone |
| FET | FICS Ethics Test |
| FET | Field Engineering Training |
| FET | Firewall Evaluation Team |
| FET | Follow-on Equipment Training |
| FET | Facilities Electrical Team |
| FET | Fleet Evaluation Trial |
| FET | Full Expertise Team |
| FET | Functional Equivalency Testing |
| FET | Field Engineering Team |
| FET | Federal Electoral Tribunal judiciary For electoral misconducts) |
| FET | Functional Equipment Transfer |
| FET | Flowline End Termination |
| FET | Federal Election Tribunal |
| FET | Fluid Energy Theory |
| FET | Facilities Engineering Team |