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F4, F.IV, F04, F 4, F.4 or F-4 may refer to:

Aircraft

  • Flanders F.4, a 1910s British experimental military two-seat monoplane aircraft
  • Martinsyde F.4 Buzzard, a British World War I fighter version of the Martinsyde Buzzard biplane
  • Fokker F.IV, a 1921 Dutch airliner
  • Caproni Vizzola F.4, an Italian prototype fighter of 1939
  • Lockheed F-4 Lightning, a reconnaissance variant of the Lockheed P-38 Lightning World War 2 fighter
  • Fleetwings Sea Bird, a variant of which was the F-4
  • A number of aircraft that first entered service with the U.S. Navy:
  • Curtiss F4C, a 1920s version of the Naval Aircraft Factory TS biplane fighter
  • Boeing F4B, a 1930s version of the Boeing P-12 biplane fighter
  • Grumman F4F Wildcat, a carrier-based fighter aircraft in World War 2
  • Vought F4U Corsair, a World War 2 fighter
  • Douglas F4D Skyray, a carrier-based fighter/interceptor, first flight 1951
  • McDonnell Douglas F-4 Phantom II, a supersonic fighter-bomber, first flight 1958

Art, entertainment, and music

  • F4, or Flower 4, the four handsome boys appearing in Japanese manga Boys Over Flowers
  • F4 (band), Taiwanese boy band
  • F4 Thailand, a Thai television series
  • F<sub>4</sub>, Middle F (musical note)
  • Fantastic Four, fictional superhero team

Computing and technology

  • Faugère's F4 algorithm in computer algebra
  • F4, a function key on a computer keyboard
  • f4transkript, a transcription software
  • Samsung Galaxy F04, an Android-based smartphone manufactured by Samsung Electronics

Mathematics

  • F<sub>4</sub> (mathematics), the name of a Lie group and also its Lie algebra f<sub>4</sub>
  • , the field with four elements
  • F<sub>4</sub>, Fermat number

Sports and games

  • F4 (classification), a wheelchair sport classification
  • Formula 4, a class of car racing
  • f4, designates a square in Algebraic notation (chess)
  • 1. f4, or Bird's opening, an opening move in chess

Transportation and vehicles

  • F4 (Istanbul Metro), a funicular railway in Istanbul Turkey
  • F4 Cross Harbour, or Cross Harbour ferry services (2017–2020), Sydney, Australia
  • F4 Pyrmont Bay, or Pyrmont Bay ferry services, Sydney, Australia
  • Albarka Air (IATA code), a Nigerian airline
  • Front-engine, four-wheel-drive layout, in automotive design
  • MV Agusta F4 series, a series of motorcycles
  • USS F-4, a U.S. Navy submarine that sank near Honolulu harbor in 1915
  • LNER Class F4, a class of British steam locomotives

Other uses

  • F4, a paper size
  • F 4 Frösön, a former Swedish Air Force wing
  • f/4, an f-number of an optical system such as a camera lens
  • F-4 Object, or Rákosi bunker, a formerly secret nuclear shelter in Budapest, Hungary
  • Form F-4, an American form used to register securities
  • Nikon F4, an SLR camera
  • F4, a tornado intensity rating on the Fujita scale
  • F4, an electrode site according to the 10–20 system (EEG)
  • F4 visa, a visa used for Korean adoptees to gain South Korean citizenship

See also

  • 4F (disambiguation)
  • Four Fs (disambiguation)