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 numeral "1" is substituted for the Roman numeral "I". "Mark", meaning "model" or "variant", can itself be abbreviated "Mk."

Military and weaponry[edit]


  • 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
  • UTDC ICTS Mark I, rolling stock used by Vancouver SkyTrain rapid transit

Other technologies[edit]

Other uses[edit]

  • Mark 1 or Mark I, the first chapter of the Gospel of Mark in the New Testament of the Christian Bible
  • Visual inspection has sometimes been called Mark I Eyeball in the US Military since the 1950s
  • Patriarch Mark I, retronym for Mark the Apostle as Patriarch of Alexandria
  • Iron Man's armor