ACR

ACR is an abbreviation for:

Armored cavalry regiment, an army or national guard regiment organized for reconnaissance, surveillance, and security in the United States
Advanced Combat Rifle, a United States Army program to find a replacement for the venerable M16 assault rifle
Algoma Central Railway, a railway in Northern Ontario that ran between Sault Ste. Marie and Hearst
Accrington railway station in the United Kingdom, which has the National Rail code "ACR"
Advanced CANDU Reactor, a type of CANDU nuclear reactor
Attenuation to crosstalk ratio, the ratio of the attenuated signal to near end crosstalk
Allowed cell rate, the rate at which a source device may send data in ATM networks
AC Reynolds High School, a high school in Asheville, North Carolina, United States
American College of Radiology, a national association of radiologists in the United States
Arctic Circle Raceway, a race track in Norway