AAR CORP. is an American aviation support company. Founded in 1951, AAR provides a broad range of products and services to the aerospace and government/defense industries, with a nearly even split between them. Engineering and manufacturing products account for approximately a third of AAR’s business and aftermarket support services the remaining two-thirds. Founded in 1951, I.A. Allen Industrial Sales was incorporated in 1955, renamed Allen Aircraft Radio in 1962 and became AAR CORP. in 1969. AAR is headquartered in Wood Dale, Illinois, a Chicago suburb near O'Hare International Airport and employs approximately 7,000 people in 17 countries at more than 60 locations around the world. AARs customers include North American and international commercial airlines (passenger and freight); aircraft leasing companies; aviation support companies; OEMs; U.S. Department of Defense and their contractors; U.S. Department of State as well as other domestic government agencies; and foreign militaries.