Mark IV explained
Mark IV or Mark 4 often refers to the fourth version of a product, frequently military hardware. "Mark", meaning "model" or "variant", can be abbreviated "Mk."
Mark IV or Mark 4 may refer to:
Computers
- 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
Religion
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
