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

Aircraft

Flanders F.4 The Flanders F.4 was a 1910s British experimental military two-seat monoplane aircraft that was designed and built by Howard Flanders as a development of the Flanders F.3. Development Following success with the Flanders F.3 experimental mono ...

, a 1910s British experimental military two-seat monoplane aircraft * Martinsyde F.4 Buzzard, a British World War I fighter version of the

Martinsyde Buzzard The Martinsyde F.4 Buzzard was developed as a powerful and fast biplane fighter for the Royal Air Force (RAF), but the end of the First World War led to the abandonment of large-scale production. Fewer than 400 were eventually produced, with man ...

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 The Lockheed P-38 Lightning is an American single-seat, twin piston-engined fighter aircraft that was used during World War II. Developed for the United States Army Air Corps by the Lockheed Corporation, the P-38 incorporated a distinctive twi ...

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 , is a Japanese ''shōjo'' manga series written and illustrated by Yoko Kamio and set in Tokyo, Japan, and the fictional "Eitoku Academy" (an elite school for children from rich families). It tells the story of Tsukushi Makino, a girl fr ...

'' * F4 (band), Taiwanese boy band * '' F4 Thailand'', a Thai television series * F₄, Middle F (musical note) *

Fantastic Four The Fantastic Four is a superhero team appearing in American comic books published by Marvel Comics. The team debuted in ''The Fantastic Four'' #1 ( cover dated Nov. 1961), helping usher in a new level of realism in the medium. It was the first ...

, 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

Mathematics

* F₄ (mathematics), the name of a Lie group and also its Lie algebra f₄ * ''F₄'', 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 Bird's Opening (or the Dutch Attack) is a chess opening characterised by the move: :1. f4 Bird's is a standard flank opening. White's strategic ideas involve control of the e5-square, offering good attacking chances at the expense of slightly ...

, 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, 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 *

Saginaw Airport Saginaw Airport was a public use airport located eight nautical miles (15 km) north of the central business district of Fort Worth, in Tarrant County, Texas, United States. The airport was named for the nearby city of Saginaw, Texas. The ...

(FAA identifier F04), a defunct public airport in Fort Worth, Texas, U.S. * USS ''F-4'', a U.S. Navy submarine that sank near Honolulu harbor in 1915

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 The F-4 Object (publicly often known as the Mátyás Rákosi, Rákosi-bunker, hu, F-4 objektum/Rákosi-bunker) is a formerly secret nuclear shelter under the Inner City (Budapest), downtown of Budapest. It is located 45-50 metres below the surfac ...

, or Rákosi bunker, a formerly secret nuclear shelter in Budapest, Hungary * Form F-4, an American form used to register securities * Nikon F4, a camera * F4, a tornado intensity rating on the Fujita scale * F4, an electrode site according to the

10–20 system (EEG) The 10–20 system or International 10–20 system is an internationally recognized method to describe and apply the location of scalp electrodes in the context of an EEG exam, polysomnograph sleep study, or voluntary lab research. This method wa ...