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was widely used for long distance communication in the early -
the radio became popular for entertaiment and news broadcasting in the 1920 -
television sets became avaliable to the public in the 1940 and quickly became a popular form of entertainment -
including the development of the first satellites and manned spacecraft -
Smartphones have become a ubquitous part of modern life, providing us with instant acces to information, communication, and entertainment -
Became widely avaliable in the 1980 and have revolutionized the way we work, communicate, and acces information