McDonnell Douglas Corporation was an American aerospace manufacturer and defense contractor formed in 1967 through the merger of McDonnell Aircraft Corporation and Douglas Aircraft Company. The company was known for producing commercial aircraft, military jets, and space systems, contributing significantly to the aviation industry. In 1997, McDonnell Douglas was acquired by Boeing, becoming part of one of the largest aerospace companies in the world. The merger allowed Boeing to expand its product offerings and strengthen its position in both commercial and military markets, while McDonnell Douglas's legacy continues to influence modern aviation technology.