Mark III or Mark 3 often refers to the third version of a product, frequently military hardware. "Mark", meaning "model" or "variant", can be abbreviated "Mk."
Mark III or Mark 3 may refer to:
Arts and entertainment Mark III line-up of rock band Deep Purple, the band's third line-up, with David Coverdale, Ritchie Blackmore, Jon Lord, Glenn Hughes and Ian Paice Mk III: The Final Concerts, a 1975 concert album by Deep Purple Emergency Medical Hologram Mark III, a character on the television series Star Trek: Voyager Mark III, a fictional cybernetic tank in the game Ogre Mark III Flying Car, a fictional vehicle driven by Danger Mouse Cobra Mk III, a spaceship in the computer game Elite MK III, a 2013 album by Steam Powered Giraffe
Technology Military and weaponry Mark III, a variant of the British Mark I tank Mark III, an alternate name for the Fat Man atomic bomb used on Nagasaki, in use until 1949 Supermarine Spitfire Mk III; a single 1940 British fighter aircraft pre-production prototype Mk III Turtle helmet (1944); British Army helmet that first saw action in the Normandy Landings Merkava Mark 3 (1989); battle tank of Israel Defense Forces Ruger MK III (2004), an American handgun
Other vehicles Geosynchronous Satellite Launch Vehicle Mark III, a launch vehicle Aston Martin DB Mark III (1957–1959), a British luxury sports car AC Cobra MkIII (aka Shelby Cobra), an American-engined British sports car produced intermittently since 1962 Superformance MkIII, a mass-produced replica of the AC Cobra MkIII Continental Mark III (1958, 1969–1971), an American personal luxury car British Rail Mark 3 (1976); a rail carriage design for high-speed and regular service Kolb Mark III ultralight aircraft Cooper Mark III, a Formula Three racing car
Other technologies Mark III (radio telescope), a radio telescope in England, constructed in 1966 Mark III (space suit), a NASA space suit prototype Mark III containment design, a third generation General Electric BWR-6 boiling water nuclear reactor design Camera models: Canon EOS-1D Mark III Canon EOS-1Ds Mark III Harvard Mark III, an early computer built at Harvard University and used by the US Navy Mesa Boogie Mark III, an electric guitar amplifier Sega Mark III, the original Japanese branding of Sega Master System, a video game console Vox Mark III, a teardrop-shaped electric guitar of the 1960s
Religion Mark 3 or Mark III, the third chapter of the Gospel of Mark in the New Testament of the Christian Bible Pope Mark III of Alexandria, patriarch of the Coptic Church from 1116 to 1189
See also Third generation (disambiguation)