Mark IV

• MARK IV (software), a 1960s-era 4th-generation programming language from Informatics • Harvard Mark IV (1952), an all-electronic stored-program computer • ETL Mark IV computer, a transistorized computer built at the ElectroTechnical Laboratory in Japan • Emergency Medical Hologram Mark IV, in Star Trek: Voyager, an artificially intelligent medical program ==Music==

• The Mark IV, American vocal group, 1950s • The Mark Four (1966–1968), an English band • MARK IV (Barbershop), a barbershop quartet that won the 1969 SPEBSQSA competition • Mesa Boogie Mark IV (1993–2008), an electric guitar amplifier • , a reproducing piano sold by Yamaha Corporation • Mark IV line-up of rock band Deep Purple, their fourth line-up, with David Coverdale, Tommy Bolin, Jon Lord, Glenn Hughes and Ian Paice ==Religion==

• Mark 4 or Mark IV, the fourth chapter of the Gospel of Mark in the New Testament of the Bible • Patriarch Mark IV of Alexandria, Greek patriarch of Alexandria in 1385–1389 • Pope Mark IV of Alexandria (died 1363), Coptic Pope in 1348–1363 ==Vehicles==

• Mark 4 (Iarnród Éireann), Irish Rail InterCity train • Mark IV monorail, train used at Walt Disney World, 1971–1989 • Mark IV tank, an up-armoured variant of the British Mark I tank, 1917 • Bristol Blenheim Mk.IV, light bomber in Royal Air Force service before and during World War II • British Rail Mark 4, passenger train • Chandelle Mk IV, ultralight aircraft • Cozy MK IV, an experimental 4 place canard aircraft derived by Nat Puffer from the Burt Rutan Long-EZ • Jaguar Mark IV (1945–1949), British car • Continental Mark IV (1959, 1972–1976), American luxury car • Merkava Mark IV (1999), main battle tank of Israel Defense Forces • Triumph Spitfire, MKIV (1970–1974), a British sports car ==Weapons==

• Webley Mk IV, a.k.a. "Boer War Model"; .455 caliber British revolver from 1899 • MK IV Series 80 M1911 pistol, semi-automatic pistol • Mark 4 nuclear bomb (1949–1953), an American nuclear bomb ==Other==

• Canon EOS-1D Mark IV, a digital SLR • AI Mark IV radar, the first air-to-air radar • Navy Mark IV (late 1950s–early 1960s), a full pressure suit designed for unpressurized military jets • Vickers Tank Periscope MK.IV (1936), designed in Poland • Mk IV Turtle helmet (1950s–1980s), British Army helmet, a slight design change from the Mk III Turtle helmet ca:Tanc Mark#Variants i desenvolupaments