The original Xerox computer was the Alto which was replaced by the Star. Xerox showed Jobs the Star and he said Thank You and immediately built the Lisa, which became the development platform for the Macintosh.
PARC (Bob Metcalfe) also developed Ethernet, based on ALOHAnet, which was developed for communications among Hawaii's various telescopes and networked computing so that Star computers could share printers. They also developed WYSIWYG word processing and other innovations.
Bob Taylor was the manager at PARC, having previously been at ARPA, where he provided funding to Douglas Engelbart at SRI to develop the computer mouse. Taylor eventually left Xerox and went to head up Digital Equipment Corporation's research efforts in Palo Alto. Some of the other PARC principles ended up at Microsoft, including Scot Macgregor who was the lead on Windows Version 1. He went on to be CEO of Broadcom. Metcalfe founded 3COM which became an important networking company.
Xerox was not making money on the Star, so they started shopping the technology. One of the people they showed it to was Steve Jobs. He elected not to invest but rather took the ideas and development Lisa and eventually the Macintosh.
Hence, Fumbling the Future.
PARC = Palo Alto Research Center