World War I was the first war in which airplanes were used. They were first flown for observation, but later began to engage in bombing and aerial duels (Baughman 87). After the war people began to realize the many uses of airplanes. Many airlines that had their beginnings in the 1920's started out carrying mail but then switched over to the growing business of passenger flights (Mattera 483-484). One of the first airlines was Douglas Airlines. It was started by Donald Douglas in Santa Monica, CA (Aviation Resource Center 3). Although it is not operating under that name any longer, it paved the way for the many airlines to come. Another big airline was American Airlines. It was started by a few Wall Street financiers who accumulated a couple of airline companies and combined them (Mattera 496). Delta Airlines also had its beginnings in the 192

Along with the transportation industry, entertainment played an important role in the new corporations of this decade. The biggest impact of the entertainment industry was the first radio broadcast from KDKA in Pittsburgh, PA. It caused the mass mania over radio during the decade (Mattera 20). The station broadcasted the Warren Harding-James Cox election (Groner 279). The following year WJZ was next with the live report of the 1921 World Series. By 1922 there were over 100 new radio station in the United States. The National Broadcasting Company, or NBC, was started by David Sarnoff in 1926. It was an arrangement between two big companies at the time, RCA and AT&T (Groner 280). Only one year after its started it had two networks under their name, NBC-blue and NBC-red. NBC-red was responsible for the first radio commercial (Mattera 21). William Paley formed CBS, or Columbia Broadcasting System, in 1927 (Groner 280). He gained control of the near failing Columbia Phonograph Record Company and joined it with the United Independent Broadcasters. It was the only real rival for NBC at the time (Mattera 21). Another important radio company was the Zenith Radio Company, which had its start in 1923. It was founded by entrepreneur Eugene F. McDonald (Mattera 44). Radio in the 1920's was important for the reason that it tied the nation together. People would sit listening to the radio. Consequently they became more informed about events in the country and the world.

Along with the raise in radio, motion pictures were also gaining acceptance in America. With the increasing popularity of the movie industry, many ne

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Approximate Word count = 1100
Approximate Pages = 4 (250 words per page double spaced)