One of the largest aircraft engine manufacturers in the world, Pratt & Whitney began launching ideas in 1925. The company, a division of United Technologies, makes and services commercial and military aircraft engines and produces space propulsion systems. Commercial air giants Airbus (nearly 12% of sales) and Boeing are Pratt & Whitney's largest commercial engine customers; military offerings include engines for the F/A-22, F-15, F-16, C-17, and the F-35 Lightning II. On the space side, Pratt & Whitney rocket engines help launch NASA space shuttles, space probes, and satellites. Pratt & Whitney also makes industrial gas turbines for power generation.