OF

OF or Of or of may refer to:

Arts and media

 * OnlyFans, an internet content subscription service
 * Odd Future, an American hip-hop collective
 * Operation Flashpoint, a video game series

Language

 * of, an English preposition
 * Old French, a medieval language

Organizations

 * Air Finland, a defunct Finnish airline (IATA airline code OF)
 * Občanské fórum, or the Civic Forum, a Czech political movement established during the Velvet Revolution in 1989
 * Osvobodilna fronta, the Liberation Front of the Slovene Nation, 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
 * 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

 * Open Firmware, computer software which loads an operating system
 * Oxygen monofluoride, a compound containing only the chemical elements oxygen and fluorine

Other uses

 * Ordinary Form, in Roman Catholicism
 * Outfielder, a defensive position in baseball