. . "broadcasting" . "Broadcast" . "Broadcasting" . "0.7216"^^ . . . . . . "Telecommunications" . "Television terminology" . "Broadcasting is the distribution of audio and/or video content or other messages to a dispersed audience via any electronic mass communications medium, but typically one using the electromagnetic spectrum (radio waves), in a model. Broadcasting began with AM radio, which came into popular use around 1920 with the spread of vacuum tube radio transmitters and receivers. Before this, all forms of electronic communication (early radio, telephone, and telegraph) were , with the message intended for a single recipient. The term broadcasting, borrowed from the agricultural method of sowing seeds in a field by casting them broadly about, was coined by either KDKA manager Frank Conrad or RCA historian George Clark around 1920 to distinguish this new activity of \"one-to-many\" communication; a single radio station transmitting to multiple listeners." . "[dataTXT] Broadcasting" . .