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  • Generally, the transmission of radio, television, cable, and satellite signals to a wide audience. The term was borrowed from agriculture, where it was traditionally used to refer to the casting of seeds over a large area. Work on sound transmitting by inventors like Guglielmo Marconi in the late 19th century and, later, Lee De Forest and Edwin Armstrong eventually led to the detection and amplification of radio signals. Radio broadcasting began in the 1920s and hit its stride in the following two decades, only to be eclipsed shortly afterward by television broadcasting. Within a few decades, the majority of American families had tele vision sets. The advent of cable broadcasting occurred in the 1950s, and satellite broadcasting followed a decade after that.

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