K3
K3 may refer to: == Transportation == China Railway K3/4 K-3 (Kansas highway), a state highway in Kansas London Bus route K3 Taquan Air, an Alaskan commuter airline (by IATA code) K-3 cart Kia Forte, a compact car sold as Kia K3 in South Korea Kia K3 (BL7), a subcompact car LNER Class K3, a class of British steam locomotives GSWRI Class K3, a Great Southern and Western Railway (Ireland) steam locomotive == Military == === Weapons === K-3 (rifle), an Armenian-made bullpup rifle Daewoo K3, a light machine gun === Ships === Soviet submarine K-3 Leninsky Komsomol, the first Soviet nuclear submarine USS K-3 (SS-34), a 1914 United States Navy K-class submarine HMS K3, a 1916 British K-class submarine HMS Heliotrope (K03), a 1940 Royal Navy Flower-class corvette === Other === Pohang Airport, by United States Air Force designator during the Korean War Life Regiment Hussars, Swedish cavalry regiment K3, a bombproof WWII submarine pen at the German Lorient Submarine Base in France == Science, technology, computing and mathematics == The Kleene logic K3 The complete graph on three vertices K 3 {\displaystyle K_{3}} A version of the K (programming language) K3 surface, a compact complex surface in mathematics Menadione, vitamin K3 K3, 1774 marine chronometer made by Larcum Kendall Pentax K-3, a digital SLR camera == Media and entertainment == K3 (band), a Belgian/Dutch girl group K3 (television), a Catalan television channel K3: Prison of Hell, a 2009 pornographic horror film K3 Film Festival, a film festival held annually in Villach, Austria, since 2007 K3, a world in Donkey Kong Country 3: Dixie Kong's Double Trouble! == Other uses == K3 League, a South Korean football league Gasherbrum IV, a mountain in the Karakoram previously surveyed as K3.