By any standard, television ranks as one of the essential technological and cultural developments of the twentieth century. The ability to transmit moving pictures with synchronized sound, in real time, to a widely dispersed audience of millions made television a communications system of enormous power. In fact, television remains the central medium of communication in all societies of the developed world. In the year 2010, citizens of the United States watched television for an average of over two and a half hours every day, using over half of their available leisure time, according to the Bureau of Labor Statistics. Viewers primarily use the medium for entertainment, while some rely on it as a source of news and information. Most people...

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