M3

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M3, M-3 or M03 may refer to:

Science[edit]

  • Cubic meter (m3), a unit of volume
  • Messier 3 (M3), a globular cluster in the constellation Canes Venatici
  • M3 Receptor, an acetylcholine muscarinic receptor
  • ATC code M03 Muscle relaxants, a subgroup of the Anatomical Therapeutic Chemical Classification System
  • M3, the minimal modular, but non-distributive lattice in mathematical order theory

Computers and electronics[edit]

  • Leica M3, a landmark 35mm rangefinder camera
  • Modula-3 (M3), a programming language
  • M3, a British peak programme meter standard used for measuring the volume of audio broadcasts
  • M3, amateur Radio callsign prefix in the United Kingdom
  • Macro processor m3 written by Dennis Ritchie for the AP-3 minicomputer. m3 is the predecessor to m4.

Entertainment[edit]

Transport[edit]

For military vehicles named M3, see M3#Vehicles.

Road transport[edit]

Roads[edit]

Rail transport[edit]

  • M1/M3 (railcar), a Long Island Rail Road and Metro-North Railroad railcar

Rail routes[edit]

Music[edit]

Military[edit]

Weapons[edit]

Vehicles[edit]

Accessory[edit]

  • M3 tripod, a modern tripod for the M2 Browning machine gun

See also[edit]