Parker-Hannifin Corp. engages in the manufacture of motion and control technologies and systems. The firm also provides engineered solutions for mobile, industrial, and aerospace markets. It operates through the Diversified Industrial and Aerospace Systems business segments. The Diversified Industrial segment offers products to original equipment manufacturers. The Aerospace Systems segment supplies aftermarket services, commercial transports, engines, helicopters, military aircraft, missiles, and unmanned aerial vehicles. The company was founded by Arthur L. Parker in 1918 and is headquartered in Cleveland, OH.