Adele Goldberg showed Jobs the Xerox GUI, but she was angry that Xerox was allowing Jobs to see ‘everything.’ She understood that Xerox had “grabbed defeat from the jaws of success” according to Jobs, by giving him access to their R&D work in exchange for shares in Apple. Without Jobs’ visit to Xerox PARC, the Macintosh, and Lisa would not have had the GUI, and Bill Gates might not have subsequently revolutionized computers with Windows.
This is an analysis based on Steve Jobs by Walter Isaacson and other sources of research. Enjoy.