(p. 202) Wisely, through the 1940s, Boeing had stayed away from the commercial sphere, an arena in which McDonnell Douglas had vastly superior abilities in the smaller, propeller-driven planes that composed the commercial fleet. In the early 1950s, however, Boeing saw an opportunity to leapfrog McDonnell Douglas by marrying its experience with large air-(p. 203)craft to its understanding of jet engines.
Collins, Jim. Good to Great: Why Some Companies Make the Leap. And Others Don’t. New York: HarperCollins Publishers, Inc., 2001.