FCI
- Chesterfield County Airport
- Curie (unit)
- F.C. Indiana
- FC Ingolstadt 04
- FCC Computer Inquiries
- FCI Tallinn
- Facility condition index
- Falling Creek Ironworks
- Family Carers Ireland
- Farm Cove Intermediate
- Federal Correctional Institution
- Fertilizer Corporation of India
- Fluid Components International
- Food Corporation of India
- Food Corporation of India F.C.
- Foraminiferal Colouration Index
- Force Concept Inventory
- Francis Crick Institute
- French Culinary Institute
- Fujisankei Communications International
- Full configuration interaction
- Functional Capacity Index
- Fédération Cynologique Internationale
- Fédération cynologique internationale
- Interoceanic Railway of Mexico
- Italian Cycling Federation