OF

OF or Of may refer to:

Organizations

• Air Finland, a defunct Finnish airline (IATA airline code OF)
• Občanské fórum, or Civic Forum, a Czech political movement established during the Velvet Revolution in 1989
• Osvobodilna fronta, the Liberation Front of the Slovenian People, the main anti-fascist Slovene civil resistance and political organization active during World War II

Places

• Of, Turkey, a town and district in Trabzon Province, Turkey
• Offenbach (district) and Offenbach am Main (German vehicle registration plates codes OF)

Post-nominals

• Officer of the Order of Fiji, which has the post-nominal letters of OF
• Old Fettesian, sometimes used as post-nominal letters to identify alumni of the British public school Fettes College, Edinburgh, Scotland

Science and technology

• OpenFirmware, computer software which loads an operating system
• Oxygen fluoride, a compound containing only the chemical elements oxygen and fluorine

Other uses

• of, a preposition
• Old French, a dialect continuum spoken from the 9th century to the 14th century
• Outfielder, a defensive position in baseball
• Mass of Paul VI, or Ordinary Form, in Roman Catholicism