| Acronym | Definition |
|---|
| FIT | Federal Income Tax |
| FIT | Faculty of Information Technology |
| FIT | Florida Institute of Technology |
| FIT | Fashion Institute of Technology (New York) |
| FIT | Fitting-Out |
| FIT | Fundamentals of Instructor Training (Red Cross) |
| FIT | Federal Institute of Technology (Switzerland) |
| FIT | Fédération Internationale des Traducteurs (French: Internationale Federation of Translaters) |
| FIT | Fraunhofer Institut für Angewandte Informationstechnik (German: Fraunhofer Institute for Applied Information Technology) |
| FIT | Institute for Applied Information Technology (GMD, Germany) |
| FIT | Fecal Immunochemical Test (InSure) |
| FIT | Framework for Integrated Test |
| FIT | Fracture Intervention Trial |
| FIT | Free International Trade |
| FIT | Failure in Time |
| FIT | Federazione Italiana Tennis |
| FIT | Flanders Investment and Trade (Flanders, Belgium) |
| FIT | Field Investigation Team |
| FIT | Face It Together (Iowa anti-drug program) |
| FIT | Frequency, Intensity, and Time |
| FIT | Frame Interline Transfer (image sensors) |
| FIT | Failure unIT (reliability analysis) |
| FIT | Forum on Information Technology |
| FIT | First Indication of Trouble |
| FIT | Frequently in Trouble |
| FIT | Foundation for International Training (Markham, ON, Canada) |
| FIT | Fingerprint Identification Technology |
| FIT | Forest Industries Telecommunications (non-profit, provides PLMRS frequency coordination) |
| FIT | Failure In Test |
| FIT | Force Integration Training |
| FIT | Fault Isolation Test |
| FIT | Fully Inclusive Tour (travel services) |
| FIT | Foreign Independent Traveler (travel industry; lone travellers as opposed to groups) |
| FIT | Formation Integrity Test (oil drilling) |
| FIT | Fully Independent Traveller (tourist not part of tour group) |
| FIT | Flight Instrument Trainer |
| FIT | Flex Interconnect Technologies (Milpitas, CA) |
| FIT | Fleet Introduction Team |
| FIT | Females in Trouble |
| FIT | FANS Interoperability Team |
| FIT | File Information Table |
| FIT | Fitness Improvement Training |
| FIT | Frequent Independent Traveler |
| FIT | Finite Integration Theory |
| FIT | Functional Integration Test |
| FIT | Frequent Individual Traveller |
| FIT | Failure Detection & Identification |
| FIT | Final Integration and Test |
| FIT | First Is Third (Camp Ozark) |
| FIT | Flow Indicator Transmitter (pipe transmitter) |
| FIT | Fault Isolation Technology |
| FIT | Facility for Interoperability Testing |
| FIT | Federal Investigation Team |
| FIT | Forward Incident Team |
| FIT | Fault Isolation Tree |
| FIT | Facility Instructor Training (FAA) |
| FIT | Foundation to Improve Television |
| FIT | Failure-Inducing Thread |
| FIT | Formation Interval Test |
| FIT | Fixed Itinerary Tours |
| FIT | Feature Integration Approach (perception) |
| FIT | Foundation for Intercultural Exchange (non-profit high school student exchange program) |
| FIT | Facilities Improvement Team |
| FIT | Functional Interface Translator |
| FIT | Flight Information Temporary (FAA notices to airmen) |
| FIT | Field Integration and Test |
| FIT | Fleet Implementation Team |
| FIT | Field Implementation Testing |
| FIT | Focus Integration Team |
| FIT | Fleet Installation Team |