Comment by kristopolous

https://youtu.be/FzbHYl17x6U?si=0EbyyYdqeyU5f5qb&t=312

This Computer Chronicles episode from 1990 should help explain it.

They did a number of episodes on it. Here's one with laserdiscs https://youtu.be/v9o5Ld8hpug?si=hBaB8MHBdMOKQsUE&t=979

I recommend binge watching old computer chronicles episodes if you're interested in startups and how software gets built, thrives and dies. If this is genuinely new to you, the guy with the beard created the CP/M operating system and had a tragic early death https://en.m.wikipedia.org/wiki/Gary_Kildall . The other guy is still around but seems to have fallen off posting online in the last few years. (https://twitter.com/cheifet/status/1642364464564510720 last update)

Here are the episodes chronologically https://archive.org/details/computerchronicles?sort=date