Please read this article[0] and educate yourself. The amount of misinformation surrounding the Apple-Xerox relationship is dizzying.

edit: this article[1] is a bit briefer, and provides much of the same information.

[0] http://obamapacman.com/2010/03/myth-copyright-theft-apple-st...

[1] http://www.folklore.org/StoryView.py?project=Macintosh&s...