Aside: if you're interested at all in the history of computer science, watch this video. Doug Engelbart gave this demo in 1968, long before personal computing. It debuted windows, graphics, video conferencing, word processing, real-time collaborative editing, and a buch of other things that still influence modern software design. Much of it influenced the projects at PARC.
Aside 2: I recognize I've been featuring black men so far, so I'm going to try to feature more women and queer figures.