FAI
- Broad Left Front (Peru)
- Collins Fai
- Endro!
- FAI Films
- FAI Insurance
- FAI armoured car
- FAI rent-a-jet
- Fai D. Flowright
- Fairbanks International Airport
- Faiwol language
- Fatal accident inquiry
- Federación Anarquista Ibérica
- Femoroacetabular impingement
- Festival de Afrobeat Independiente
- Field-aligned irregularity
- First article inspection
- Fondo per l'Ambiente Italiano
- Food Allergy Initiative
- Football Association of Ireland
- Forschungs- und Arbeitsgemeinschaft Irland e.V.
- Free androgen index
- Friendly artificial intelligence
- Fully Automatic Installation
- Futsal Association of India
- Fédération Aéronautique Internationale
- George Fai
- Informal Anarchist Federation
- Italian Anarchist Federation
- Sonny Fai