[citation][nom]digitalprospecter[/nom]Watch the documentry called "Pirates of Silicon Valley" and you'll learn that Microsoft and Apple both stole ideas from Xerox.[/citation]
Apple never stole anything. The Mac team was granted a license to concepts from the Alto computer system developed at Xerox in exchange for Apple stock. Microsoft, then licensed Apple's key user interface elements for Windows 1.0, in exchange for Mac versions of popular Microsoft products.
If Steve Jobs not been forced out of Apple at the time, today there would be no Microsoft. Without that initial contract with Apple Windows would have infringed on Apple's copyright. The Apple v. Microsoft "Look and Feel" lawsuit was ultimately resolved using contract law, not copyright law.
I have often wondered if Microsoft is genuinely preserving the Windows Brand: Windows 1.0, Windows 2.0 Windows 3.0, Windows 3.1, Windows 95, Windows 98, Windows NT, Windows 2000, Windows XP, Windows Vista, and now Windows 7. Or are they locked into the Windows name given the initial deal with Apple to use the UI for Windows 1.0 and successor versions.