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AVR may refer to:

  • Aboriginal Voices Radio, an Aboriginal Canadian national radio network
  • Allegheny Valley Railroad, shortline railroad in Pennsylvania, U.S.
  • Annapolis Valley Radio, a country station located in Kentville, Nova Scotia
  • Aortic valve replacement
  • Armed violence reduction
  • Assiniboine Valley Railway, a minimum gauge railway in Winnipeg, Canada
  • Atmel AVR, a family of microcontrollers
  • Automatic voltage regulator
  • Automatic Volume Recognition in OS/360 and successors
  • AV receiver
  • Avacyn Restored
  • Avon Valley Railway, a heritage railway in the United Kingdom
  • AVR reactor, a German prototype pebble bed reactor
  • Video file used by certain set-top boxes which use MPEG transport stream (TS) as video codec
  • Aviator, a pilot of an airplane or other heavier-than-air aircraft

aVR may refer to:

  • Lead augmented vector right (aVR), a voltage difference in electrocardiography