Wanted to have this as a separate post. Someone on a digital radio mailing list posted this video from 1984:
It's a mostly alarmist piece about how piracy is destroying the software industry. It seems to be intact nearly 30 years later. In the last 30 seconds or so it includes a bit about Hams who are doing basically shared development of software by sending it back and forth over the radio. The software was stored on cassette tapes in this. The Ham at the end holds his microphone up to the tape player and hits play.
I wonder how long he had to sit there like that. Hah. Those things only ran at 1200baud I think. Maybe it was a really short program, just like 1 or 2k.