The first communications satellite. called Telstar,was launched from Cape Canaveral on July 10,1962. This marked the start of rapid transmission of TV signals over wide areas. What we take for granted today-satellite television, cellular telephones,wireless and high-speed Internet connellitections,and so forth-were part of science fiction only 40 years ago.Teenagers today are the fistreal citizens of the digital world. Unlike their parents, they have grown ug tn a world in which electronic deliyery of information and entertainment is natural and more accepted than conveentional forms like the newspaper,tape,or film.