F2

F2, F02, F.II, F.2, F 2 or F-2 may refer to  :

Science and Mathematics

• F₂, the chemical formula for Fluorine gas
• F₂, a layer of the ionosphere
• F2 hybrid, a type of crossing in classical genetics
• F-2 mycotoxin, a chemical compound
• F2 tornado, a rating of tornado on the Fujita scale
• Guillard's F/2 Mixture, a growth medium (specific concentration's of nutrients) that algae is grown in
• NIST-F2, atomic clock
• $\mathbb F_2$, the Galois field with two elements, also denoted as GF(2)

Medicine

• F02: the ICD-10 code for Dementia in other diseases classified elsewhere
• F-2 (psychedelic), a psychedelic drug
• Foundation Year 2, the second year of the UK Foundation Programme for postgraduate medical practitioners
• A brain region located in the frontal cortex of the macaque

Transportation

Aviation

• Beechcraft F-2 Expeditor
• 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
• F2 is the IATA airline designator for Fly Air
• F-2 Banshee, a carrier-based jet fighter aircraft of the 1950s
• F2 Tiger, another name for the Fieseler Fi 2 aerobatic plane
• Fairey F.2, a 1917 British fighter prototype
• Felixstowe F.2, a 1917 British First World War flying boat
• Flanders F.2, a 1911 British experimental single-seat monoplane aircraft
• Fokker F.II, a 1919 German early airliner
• Hunter F 2, a 1953 Hawker Hunter fighter aircraft variant
• Lübeck-Travemünde F.2, early German reconnaissance floatplane
• Metropolitan-Vickers F.2, a 1941 British early turbojet engine
• Mitsubishi F-2, a Japanese fighter aircraft, based on the F-16 Fighting Falcon
• RAF Tornado F.2, the first generation of the Panavia Tornado Air Defence Variant

Maritime

• HMS F2, a F-class submarine of the Royal Navy
• USS F-2 (SS-21), an F-class submarine of the United States Navy

Rail

• GSR Class F2, an Irish 2–4–2T steam locomotive
• EMD F2, a locomotive model
• H&BR Class F2, a locomotive model
• PRR F2, an American PRR 2-6-0 steam locomotive

Road

• Alta F2, 1952 racing car
• F2 Castlereagh Freeway, one of the names used for the North Western Expressway in Sydney
• F2 road (Zimbabwe), a road in Zimbabwe
• Formula Two, a category in motor racing

Military

• F 2 Hägernäs, a former Swedish Air Force wing
• F2 L16 81mm Mortar, version produced and used by Australia
• 20 mm modèle F2 gun, French naval gun
• KMW F2, a German-designed, light, armoured vehicle, which is intended to replace the Fennek
• Fairey F.2, a 1917 British fighter aircraft

Technology

• Flat-twin engine
• A function key, on a computer keyboard
• A standard white point for cool white fluorescent lamps
• Nikon F2, a professional SLR camera
• Taito F2 System, video arcade game hardware
• F2 in telecommunication is also referred to as the Secondary Feeder Cable

Computers

• Function key F2 on the keyboard

United States Visa

• F-2 visas are for spouses and children of F-1 visa holders.