the industrial products are transportation equipment, commercial and private aircraft, food processing, publishing, chemical products, machinery, apparel, petroleum, and mining. 4% of kansas's gdp is from the aviation industry. many parts of airplanes are made in wichita. also, many important companies are near kansas city, missouri. for example, the sprint nextel corporation is one of the biggest telephone companies in the united states. its main operational offices are in overland park, kansas.