AVR

AVR may refer to:

Railroad

 * Allegheny Valley Railroad, 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 (Arbeitsgemeinschaft Versuchsreaktor), 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