History of mass media By AlannahG874391 1730 The growth of the first commercial printing industry around London’s Grub Street 1820 Photography is invented 1830 The Telegraph is invented 1840 The Telegraph is commonly used 1877 The Phonograph is invented 1920 The first U.S. commercial radio station went on the air 1927 Networks that linked radio stations were made 1950 Newspapers, magazines, movies, phonograph records and radio programs were common place 1951 Broadcast television became mainstream 1990 Computers and the internet are now in use by the public
