Parker-Hannifin Corp. is a diversified manufacturer of motion and control technologies and systems, providing precision engineered solutions for a wide variety of mobile, industrial and aerospace markets. It operates through two business segments: Diversified Industrial and Aerospace Systems. The Diversified Industrial Segment products are made primarily to original equipment manufacturers. The Aerospace Systems Segment products are made primarily in the commercial and military aerospace markets. The company was founded by Arthur L. Parker in 1918 and is headquartered in Cleveland, OH.