AVR may refer to:

Railroad

  • Allegheny Valley Railroad (1995), shortline railroad in Pennsylvania, U.S.
  • Aroostook Valley Railroad, a defunct railroad in Maine, U.S.
  • Assiniboine Valley Railway, a minimum gauge railway in Winnipeg, Canada
  • Avon Valley Railway, a heritage railway in the United Kingdom

Radio

  • Aboriginal Voices Radio, an Aboriginal Canadian national radio network
  • Annapolis Valley Radio, a country station located in Kentville, Nova Scotia

Electronics

  • AVR microcontrollers, a family of microcontrollers originally developed by Atmel, now part of Microchip Technology
  • Audio/video receiver, a home theater electronic component
  • Acronym for augmented reality and virtual reality interactive experiences
  • Automatic voltage regulator

Other uses

  • Armed violence reduction
  • Aortic valve replacement
  • Automatic voter registration
  • Avacyn Restored
  • AVR reactor ('), a German prototype pebble bed reactor
  • Avirulence gene, "Avr"
  • Auxiliary Vessel, Rescue or Aircraft Vessel, Rescue
  • Lead augmented vector right (aVR), a voltage difference in electrocardiography