M1 can mean the following:

  • M1 Garand, a US battle rifle circa WWII.
  • M1 Carbine, a US carbine circa WWII.
  • M1 Abrams, a US Main Battle Tank.
  • '''M1 freeway, Hungary a major superhighway in Hungary.
  • '''M1 highway, Russia, a major highway in Russia.
  • M1 motorway, a major highway in England
  • Messier object M1, see Crab Nebula
  • M1 in economics refers to the amount of cash in circulation plus the amount in checking or demand-deposit accounts. See money supply.

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