F2

F2, F.II or similar may refer to:

Science and mathematics

 * F2, the chemical formula for fluorine
 * $$\mathbb F_2$$ 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

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

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

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

 * HMS F2, an F class First World War submarine of the Royal Navy
 * USS F-2 (SS-21), a 1910s F-class submarine of the United States Navy
 * 20 mm modèle F2 gun, a French naval gun

Land

 * F2 81mm Mortar, an Australian weapon
 * FR F2 sniper rifle, the standard sniper rifle of the French military
 * KMW F2, a German modular wheeled armoured vehicle

Other uses

 * F2 (classification), a wheelchair sport classification
 * F-2 visa, a U.S. visa type for dependents of students
 * F2Freestylers, British freestyle football duo also known as The F2
 * F2 Logistics, Filipino logistics company
 * F2 Logistics Cargo Movers, volleyball team owned by the logistics company of the same name
 * Formula Two, a type of open-wheel racing
 * F2, the second formant