How the Cassette Tape Helped Create the Internet

'In 1983, Simon Goodwin had a strange thought. Would it be possible to broadcast computer software over the radio? If so, could listeners record it off the air and onto a cassette tape? This experiment, and dozens of others in the early 1980s, created a series of cassette fueled, analog internets.  Simon Adler at Radiolab reports for On the Media.'