OFB may refer to: Ordnance Factories Board, an Indian industrial setup engaged in the production of arms, ammunition and other equipment for military and civilian applications Austrian Football Association (German: Österreichischer Fußball-Bund, ÖFB) Outflow boundary, in meteorology, the leading edge of precipitation-cooled air emanating from a thunderstorm Output feedback, a mode of operation for block ciphers in cryptography Overseas Filipino Bank, a state-owned bank in the Philippines Oklahoma Farm Bureau Open for Business (blog)|Open for Business]], an online general interest publication with a technology focus The Sims 2: Open for Business Oregon Food Bank OFB (rap group), or Original Farm Boys, a UK drill music group Operation Forth Bridge, the national plan for handling the death of Prince Philip