FOC
- FOC (album)
- FOCS (disambiguation)
- Faint Object Camera
- Falls of Cruachan railway station
- Far Out Corporation
- Father of the Chapel
- Federal Office of Culture
- Festival of Code
- Fiber-optic cable
- Field-oriented control
- Finnish Organization of Canada
- First Class CW Operators' Club
- First order condition
- Flag of Convenience (band)
- Flag of convenience
- Flag of convenience (business)
- Flight of the Conchords
- Foc (Barcelona Metro)
- Focus (linguistics)
- Fractional-order control
- Free of charge
- Freedom of choice
- Friend of the court
- Full operational capability
- Fundamental Orders of Connecticut
- Fusarium oxysporum f.sp. cubense
- Fuzhou Changle International Airport
- Workers Front of Catalonia