Founded in 1917 as Parker Appliance, Parker-Hannifin began by selling pneumatic brakes. Through acquisitions of branded component businesses, the company has expanded into aerospace engines, agricultural and construction equipment, freight and passenger vehicles, and industrial automation systems. Within these end markets, Parker-Hannifin supplies a broad portfolio of small but essential products, including hydraulic, electromechanical, climate control, and filtration components. Many of these offerings are designed to operate together, supporting a strong level of cross-selling.