The acronym FOC stands for:
- FOC (album), debut album by Australian rock group Far Out Corporation
- FOC (producer) an American HipHop Producer, formerly working with Dr. Dre and 50 Cent
- the Faint Object Camera, as used in the Hubble Space Telescope
- Father of the Chapel, a Trade Union official
- Fibre Optic Cable
- Field-oriented control, "a math-intensive technique for controlling brushless dc and ac induction motors"
- Firm Order Commitment
- First Class CW Operators' Club, an Amateur Radio morse code organisation
- First Order Condition, an equation used to calculate a minimum or a maximum
- Flag of convenience
- Flag of Convenience (band), rock group formed by former members of the Buzzcocks
- Flight of the Conchords, a Grammy Award-winning New Zealand comedy duo composed of Bret McKenzie and Jemaine Clement.
- Star Wars: Empire at War: Forces of Corruption, an expansion for the game Star Wars: Empire at War
- Fraction organic carbon in the field of hydrogeology
- Free of charge
- Friends of Carlotta (cryptic recurring acronym from the film Dead Men Don't Wear Plaid)
- Front Obrer de Catalunya
- Fuzhou Changle International Airport - (IATA: FOC, ICAO: ZSFZ)
- Transformers: Fall of Cybertron