F3 or F03 may refer to:
Computing F3, a function key on a computer keyboard F3 (language), the working name for JavaFX Script, a scripting language Fat-Free Framework, a PHP web application framework
Military Douglas F-3 Havoc, a photographic reconnaissance plane Douglas F3D Skyknight (later F-10 Skyknight), a Douglas twin engine, mid-wing jet fighter F 3 Malmslätt, a former Swedish Air Force unit Felixstowe F.3, a 1917 British First World War flying boat Hannover F.3, a World War I German prototype escort fighter HMS Cossack (F03), a 1937 British Royal Navy destroyer HMS F3, a British F class submarine , an Italian Regia Marina (Royal Navy) submarine in commission from 1916 to 1919 McDonnell F3H Demon (later F-3 Demon), a United States Navy carrier-based jet fighter Mk F3 155mm, French self-propelled gun RAF Tornado F3, a British fighter USS F-3 (SS-22), a United States Navy submarine A future Japanese fighter jet (F-3 or F-X) based on the i3 conceptual jet fighter and Mitsubishi X-2 prototype
Transportation BYD F3, an automobile EMD F3, a North American cab-style diesel locomotive introduced in 1945 F3 (Istanbul Metro), a funicular railway line in Istanbul, Turkey F3 class, project name for the mega-cruise ship Norwegian Epic Fokker F.III, a 1921 Dutch single-engine high-winged monoplane aircraft Hinterhoeller F3, a yacht design by Canadian boat builder Hinterhoeller Yachts MV Agusta F3 series, an Italian sports motorcycle Spyder F3, a model of the three-wheeled motorcycle BRP Can-Am Spyder Roadster Sydney Ferries' Parramatta River ferry service, known as the F3 Pacific Motorway (Sydney-Newcastle), formerly Sydney–Newcastle Freeway and commonly known as F3 LNER Class F3, a class of British steam locomotives
Arts F3 (manga) (F³: Frantic, Frustrated & Female), a hentai manga series F3 (film), a 2022 Indian Telugu-language film by Anil Ravipudi, a sequel to F2 (2019) F3, an album by Emade and Fisz
Other F3 (classification), a wheelchair sport classification F3 (font format), created by Folio, Inc F3 (gene), a protein F3 isoprostane F3 Nation, a network of free peer-led workouts for men in the U.S. Form, fit and function, an engineering term relating to design processes Formula Three, a class of automobile racing Forsmark 3, a unit at Forsmark Nuclear Power Plant, Sweden Motorola Motofone F3, a mobile phone Nikon F3, an SLR camera A tornado intensity rating on the Fujita scale F3, a type of formant in speech science F3, an EEG electrode site according to the 10-20 system F3 Derby, association football rivalry between Central Coast Mariners and Newcastle Jets
See also F2 (disambiguation) 3F (disambiguation)