View source for Mark I

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'''Mark I''' or '''Mark 1''' often refers to the first version of a weapon or military vehicle, and is sometimes used in a similar fashion in civilian product development. In some instances, the [[Arabic numerals|Arabic numeral]] "1" is substituted for the [[Roman numerals|Roman numeral]] "I". "Mark", meaning "model" or "variant", can itself be abbreviated "Mk." It may refer to:
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==Military and weaponry==
*[[Mark I tank]] (1916), the first tank to be used in combat
*[[Mk 1 grenade]], the first American-designed grenade used by American forces in World War I
*[[Mark I trench knife]], a combat knife carried by US forces after World War I
*[[Supermarine Spitfire variants part one#Mk I (Type 300)|Supermarine Spitfire Mk I]] (1938), Royal Air Force fighter aircraft
*[[Mark I Fire Control Computer]], United States Navy fire control computer used in World War II surface ships
*[[Little Boy|Mark I Nuclear Weapon (Little Boy)]], first nuclear weapon used in combat
*The [[Mark I NAAK]], an auto-injector carried by military personnel for use in case of nerve agent attacks
*[[Patrol Boat, River]] ("Mark I PBR", 1966), 31-foot version of the US Navy riverine patrol boat
*[[Mk 1 Underwater Defense Gun]], 1970s United States Navy dart-shooting underwater firearm
==Vehicles==
*[[Mk I Mini]] (1959-1967); the original Austin Mini and Morris Mini-Minor from British Motor Corporation
*[[British Railways Mark 1]], the first standardised passenger-rated rolling stock (carriages or cars), introduced on British Railways in the 1950s
*[[Skytrain (Vancouver) rolling stock|UTDC ICTS Mark I]], rolling stock used by Vancouver SkyTrain rapid transit
==Computers==
*[[Harvard Mark I]] (1944), an early automatic digital computer made by IBM
*[[Colossus Mark I]] (1944), a British computer used to crack military codes
*[[Manchester Mark 1]] (1949), an early Autocode computer
*[[Ferranti Mark 1]] (1951), an early computer based on the Manchester Mark 1
*MARK 1 or [[Perceptron]] (1959-1960), a neural net computer designed by Frank Rosenblatt at Cornell University
==Other technologies==
*[[Mark I (detector)]], a particle detector at Stanford Linear Accelerator Center from 1973 to 1977
*[[GE BWR]] Mark I boiling water reactor, a Generation II nuclear reactor
*The [[Lovell Telescope]], called the Mark I between 1961 and 1970, then the Mark IA between 1971 and 1987
==Other uses==
*[[Mark 1]] or Mark I, the first chapter of the Gospel of Mark in the New Testament of the Christian Bible
*[[Patriarch Mark I]], retronym for Mark the Apostle as Patriarch of Alexandria
*"Mark I" or "Mark 1", the working title of "[[Tomorrow Never Knows]]," a song by the Beatles
*[[Visual inspection]], sometimes called "Mark I Eyeball" in US Military slang since the 1950s
*[[Mesa Boogie Mark Series#Mark I|Mesa Boogie Mark I]] (1969), an electric guitar amplifier
*Mark I, first version of [[Iron Man's armor]]
==See also==
*[[Mark One (disambiguation)]]
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