F2, F.II or similar may refer to: Science and mathematics F2, the chemical formula for fluorine or GF(2), in mathematics, the Galois field of two elements F2, a category in the Fujita scale of tornado intensity F2 hybrid, a type of crossing in classical genetics F2 layer, a stratum of the Earth's ionosphere F-2 mycotoxin or zearalenone, a chemical produced by fungi NIST-F2, an atomic clock Medicine F2 or Foundation Year 2, part of the UK Foundation Programme for postgraduate medical practitioners F-2 (drug), a psychedelic drug F2-isoprostane, a compound formed in vivo from fatty acids F2 gene, present on human chromosome 11, encodes for thrombin Films F2: Fun and Frustration, a 2019 Indian Telugu language film starring Venkatesh and Varun Tej Technology , a function key on a computer keyboard F2 or flat twin engine, a type of two-cylinder internal combustion engine Anik F2, a Canadian geostationary communications satellite Nikon F2, a professional SLR camera Transportation Aviation Fly Air, IATA designator F2, a Turkish private airline Fieseler F2 Tiger, a German single-seat aerobatic biplane Flanders F.2, a 1911 British experimental single-seat monoplane aircraft Fokker F.II, a 1919 German early airliner Metropolitan-Vickers F.2, a 1941 British early turbojet engine Rail EMD F2, a class of GM diesel freight locomotive built in 1946 H&BR Class F2, a class of 0-6-2T steam locomotives of the Hull and Barnsley Railway PRR F2, a classification of Mogul steam locomotive on the Pennsylvania Railroad Road Alta F2, a 1952 British racing car DKW F2, a 1930s German small car Marussia F2, a Russian large luxury car Boat F2, the Sydney Ferries' services to Taronga Zoo Military Air Beechcraft F-2 Expeditor, an American twin engine reconnaissance aircraft Blackburn F.2 Lincock, a 1928 British single-seat lightweight fighter Bristol F.2 Fighter, a 1916 British two-seat biplane fighter and reconnaissance aircraft Dassault Mirage F2, a 1960s French prototype two-seat attack fighter Fairey F.2, a 1917 British fighter prototype Felixstowe F.2, a 1917 British First World War flying boat Hunter F 2, a 1953 Hawker Hunter fighter aircraft variant Lübeck-Travemünde F.2, early German reconnaissance floatplane McDonnell F-2 Banshee, a carrier-based jet fighter aircraft of the 1950s Mitsubishi F-2, a Japanese fighter aircraft, based on the F-16 Fighting Falcon RAF Tornado F2, a long-range, twin-engine swing-wing interceptor F 2 Hägernäs, a former Swedish Air Force wing Sea , an F class First World War submarine of the Royal Navy , a