This is a lot of history crammed into an hour. Goes from the early code-breaking work and the development of Drum Memory at Engineering Research Associates.
ERA merged with Sperry/Univac/Remington and then begat Control Data, Cray, Unisys and many others.
Also tune in for some history of the Oregon Trail by Minnesota Educational Computing Consortium (MECC) and how that ties into the rise of Internet Gopher.
Oh and disclaimer: former Gopher Dude here.