AAR CORP. provides products and services to aviation, government, and defense markets worldwide. The company operates trough two segments, Aviation Services and Technology Products. The Aviation Services segment sells and leases various new, overhauled and repaired engine, and airframe parts and components to commercial and defense customers; provides customized inventory supply and management, warranty claim management, and outsourcing programs for engine and airframe parts and components; and offers customized performance-based logistics programs in support of the U.S. Department of Defense and foreign governments. This segment also provides airframe maintenance inspection and overhaul, painting, line maintenance, airframe modification, structural repair, avionic service and installation, exterior and interior refurbishment, and engineering services, as well as support for commercial and military aircrafts; and repair and overhaul for landing gears, wheels, brakes, and actuators; and airlift services, such as in fixed-and rotary-wing flight operations, and transporting personnel and cargo to government customers, as well as sells and leases used commercial aircrafts. The Technology Products segment designs, manufactures, and repairs airdrop and other transportation pallets, and containers and shelters used in support of military and humanitarian tactical deployment activities; designs, manufactures, and installs in-plane cargo loading and handling systems for commercial and military aircraft and helicopters; and provides engineering, design, and system integration services for specialized command and control systems. The company primarily markets and sells products and services through its own employees and sales agents. As of May 31, 2013, it had ownership interests in 18 aircrafts. The company was founded in 1951 and is headquartered in Wood Dale, Illinois.