Broadcasting in the United States - Wikipedia
https://en.wikipedia.org/wiki/Broadcasting_in_the_United_States
Broadcasting in the United States began with experiments with wireless transmission during the 19th century, with varying degrees of success. These transmissions were initially by radio hobbyists fascinated with the technology. Once techniques were perfected, radio became a necessity for military and commercial users alike. Eventually, broadcasting would come to have a major impact throughout the country. Growth divided television broadcasting into several genres…
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