I didn't realize this. Thank you Robert Feder for this info today...
“We’d appreciate it if anyone hearing this broadcast would communicate with us as we are very anxious to know how far the broadcast is reaching and how it is being received.” With those words — uttered by announcer Leo Rosenberg — Pittsburgh’s KDKA Radio began what historians consider the first commercial broadcast in the United States. On the night of November 2, 1920, the Westinghouse station carried results of the presidential election that day between Warren G. Harding and James M. Cox. Within two years more than 500 licensed stations were broadcasting across the country — including Zenith Radio Corporation’s WJAZ in Chicago.
Radio had a good run. Glad that I lived during the radio century.
