Milestone Timeline By Snac2013 1920 The Introduction of Radio 1950 Headphones were introduced and installed in listening stations in classroom 1970 Increased use of microcomputers. 1980 The development of the Apple McIntosh. 1990 The emergence of educational CD-ROMs 2000 A major breakthrough in the use of Internet Access 2010 iPads, iPhones, smartphones began to replace older mobile devices.
