TV is one of our most important means of communication. It brings pictures and sounds around the world to
millions of homes. Communication satellites in space transmit TV
pictures across oceans and continents. In the late 1970's, such devices as video cassette recorders videodisc players, and personal computers have changed the way people use television in their homes. For example, TV-sets may be used for such purposes, as playing electronic games and receiving televised
information services.