États-Unis dans la Première Guerre mondiale
The involvement of the United States in World War I would bring about changes that would take broadcasting out of the hobbyist's workshop and on to a grand stage. The United States Navy would use broadcasting to relay messages between ships, airplanes, and shore stations throughout the war. The result of the Navy's demand for broadcasting was the mass production of radio equipment with simplified construction and operation requirements so they could be readily used by the common man. Receivers like the Westinghouse SCR-70 were a single, self-contained unit that required minimal technical ability. Following the war, these units were so plentiful and reasonably priced that virtually every American could own one. This wide availability led to the realization of a market which included everyone.