FFI
- Family Firm Institute
- Fatal insomnia
- Fauna and Flora International
- Fellow of the Flag Institute
- Festival Film Indonesia
- Film Federation of India
- Final Fantasy (video game)
- Final Fight (video game)
- Finlay Forest Industries
- Foia Foia language
- Foreign function interface
- Franciscan Friars of the Immaculate
- Frederikshavn fI
- Free File, Inc.
- French Forces of the Interior
- Fuel Freedom International
- Norwegian Defence Research Establishment