- FICA (Fur Information Council of America)
- FICAH (Food Industry Crusade Against Hunger)
- FICE (Fédération des Communités Educatives)
- FICON (FIber CONnectivity)
- FICS (Free Internet Chess Server)
- FID (Foreign Internal Defenses)
- FIDAF (Foreign Internal Defense Augmentation Force)
- FIDÉ (Fédération internationale des échecs (French, "World Chess Federation"))
- FIDE (Fuzzy Inference Development Environment)
- FIDL (FAAD ( Forward Area Air Defense) Instrument Data Link)
- FIDM (Fashion Institute of Design & Merchandising)
- FIDO (Film Industry Defence Organisation)
- FIDP (Foreign Internal Defense Plan)
- FIE (Fly-In Echelon)
- FIESTA (Fun, Innovation, Enthusiasm, Spirit, Teamwork, and Attitude)
- FIF (Field In Filename)
- FIFA (Fédération internationale de football association (French, "International Association Football Federation"))
- FIFe (Fédération internationale féline (French, "International Feline Federation"))
- FIFI (Faith In the Family International)
- FIFO (First In, First Out)
- FIFRA (Federal Insecticide, Fungicide, and Rodenticide Act)
- FIFV (Future Infantry Fighting Vehicle (US))
- FIG (Fédération internationale des géomètres (French, "International Federation of Surveyors"))