F3

F3, F03, F.III, F.3, F 3 or F-3 may refer to:
* F3 class, a project name for an upcoming class of mega-cruise ships
* F-3 Demon, a carrier based jet fighter of the United States Navy
* F3 (font format), created by Folio, Inc.
* F3 (language), the working name for JavaFX Script, a scripting language
* F 3 Malmslätt, a former Swedish Air Force unit
* F3 (Zimbabwe), a road in Zimbabwe
* EMD F3, a locomotive
* Felixstowe F.3, a 1917 British First World War flying boat
* Fokker F.III, a 1921 Dutch single-engined high-winged monoplane aircraft
* Hannover F.3, a WWI German prototype escort fighter
* HMS "F3", a British F class submarine
* HMS Cossack (F03), a 1937 British Royal Navy Tribal-class destroyer
* Motorola Motofone F3, a mobile phone
* Nikon F3, a professional SLR camera
* RAF Tornado F3
* PRR F3, an American
* Taito F3 System
* USS "F-3" (SS-22), F-class submarine of the United States NavyF³ may refer to:
* F³ (Frantic, Frustrated and Female), a hentai anime series

and also :
* F3D Skyknight (later F-10 Skyknight), a Douglas twin engine, mid-wing jet fighter
* a function key to which can be assigned various purposes depending on the operating system or application in use
* Fallout 3, an unreleased computer game
* Form, fit and function, an engineering term relating to design processes
* Formula Three racing
* the former designation of the Sydney-Newcastle Freeway
* Faso Airways IATA airline designator
* a tornado intensity rating on the Fujita scale, suggesting a strong tornado
* F03 : Unspecified dementia code