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 The Caproni Vizzola F.4 was an Italian fighter aircraft prototype that was designed in 1937 and built from 1939. It was a single-seat, low-wing cantilever monoplane with retractable landing gear. Development The F.4 was developed in parallel wit ...

, 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 The Fleetwings Sea Bird (or Seabird) was an American-built amphibious aircraft of the 1930s. Design and production The Sea Bird was an amphibious utility aircraft designed in 1934–1935 by James C. Reddig for Fleetwings, Inc., of Bristol, Penns ...

, 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 The Naval Aircraft Factory TS-1 was an early biplane fighter aircraft of the United States Navy, serving from 1922 to 1929. Development While the Vought VE-7s were serving the Navy well in the early 1920s, they were not originally designed a ...

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) F4 (Flower Four) or JVKV was a Taiwanese boy band consisting of Jerry Yan, Vanness Wu, Ken Chu, and Vic Chou. The group F4 was formed in 2001 after the Taiwanese drama '' Meteor Garden'' that they starred in was widely successful. Together they ...

, 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 Transcription software assists in the conversion of human speech into a text transcript. Audio or video files can be transcribed manually or automatically. Transcriptionists can replay a recording several times in a transcription editor and type w ...

Mathematics

* F₄ (mathematics), the name of a Lie group and also its Lie algebra f₄ * ''F₄'', Fermat number

Sports and games

F4 (classification) F4, also T4 and SP4, is a wheelchair sport classification that corresponds to the neurological level T1- T7. Historically, it was known as 1C Incomplete, 2 Complete, or Upper 3 Complete. People in this class have normal upper limb function, and ...

, a wheelchair sport classification *

Formula 4 FIA Formula 4, also called FIA F4, is an open-wheel racing car category intended for junior drivers. There is no global championship, but rather individual nations or regions can host their own championships in compliance with a universal set of r ...

, a class of car racing * ''f4'', designates a square in

Algebraic notation (chess) Algebraic notation (or AN) is the standard method for recording and describing the moves in a game of chess. It is based on a system of coordinates to uniquely identify each square on the chessboard. It is used by most books, magazines, and newsp ...

* 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) The F4, officially referred to as the F4 Boğaziçi Üni./Hisarüstü–Aşiyan funicular line ( tr, F4 Boğaziçi Üni./Hisarüstü–Aşiyan füniküler hattı) is a long funicular railway in Beşiktaş, Istanbul. When opened on 28 October 2022, ...

, a funicular railway in Istanbul Turkey *

F4 Cross Harbour The Cross Harbour ferry service, officially known as F4 Cross Harbour, was a commuter ferry service in Sydney, New South Wales. Part of the Sydney Ferries network, it was operated by Transdev Sydney Ferries and serviced the Darling Harbour, Lave ...

, or Cross Harbour ferry services, Sydney, Australia *

Albarka Air Albarka Air was an airline based in Abuja, Nigeria. It operated scheduled and charter services within Nigeria and charters to other countries in central and west Africa. Its main base was Nnamdi Azikiwe International Airport, Abuja.Flight Internat ...

(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 Form F-4 is an American Form used to register securities in connection with business combinations and exchange offers involving foreign private issuers. These activities include mergers & acquisitions, going-private transactions, rights offerings ...

, 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 ...