[antiRepublicrat]

Xerox had no idea what they had when they invented the GUI and mouse, and gave it all away.

Apple actually paid for the visit with a lot of Apple shares. The mouse was invented by Douglas Engelbart at Stanford; however, PARC did improve on Engelbart's design with the ball-based mouse (and their GUI was also an improvement on Engelbart's earlier work).

[Yo-Yo]

And Steve Jobs brought a bunch of the PARC researchers to work on the Lisa project, which led to the Mac.