FO

Fo or FO may refer to:

  • Fo Department of the Houet Province of Burkina Faso
  • Face Off (disambiguation)
  • Fallout (computer game)
  • Faroe Islands, ISO 3166-1 country code, FO
    • .fo, the country code top level domain (ccTLD) for Faroe Islands
  • Faroese language (language code fo)
  • abbreviation used for the Italian province of Forlì
  • Field officer, a senior army officer
  • Finger Offensive, a skill of the Monk character class in Ragnarok Online, also known as Throw Spirit Spheres.
  • First-order logic, a system of mathematical logic
  • First Officer, or co-pilot on an airliner
  • Flying Officer, a Royal Air Force rank
  • Dario Fo, Italian playwright and Nobel laureate
  • Football Outsiders, a website devoted to statistical analysis of the NFL
  • Force Ouvrière, a French trade unions confederation
  • Foreign and Commonwealth Office of the British government
  • Foreign object (disambiguation)
  • Foreign Objects (band), a Pennsylvania music group
  • Forward Observer, a soldier who directs artillery fire
  • Fourier number (Fo) in physics
  • Front office
  • Franco-ontarien, French-speaking citizen of the (largely anglophone) Canadian province of Ontario, Canada
  • Fuck off (disambiguation), English expletive, and various other meanings
  • Fuel factor (Fo), used to check the accuracy of an emission measurement system
  • Fuel oil or also called Furnace Oil
  • FunOrb, a Java-based gaming website
  • Furka-Oberalp-Bahn, a Swiss railway
  • Futures and Options
  • Number 4 (slang abbreviation fo’)
  • XSL Formatting Objects (XSL-FO)
  • Airlines of Tasmania IATA airline designator
  • FO, a subunit of F1FO type ATPase
  • Fo Fai, a character in the Battle Arena Toshinden video game series
  • Frame optional military symbol
  • Fo Porter, a contestant on America's Next Top Model, Cycle 12
  • Fó or Fú (佛、仏), the Chinese name for Buddha