The workstation from Xerox that officially introduced the graphical user interface and desktop metaphor in 1981. It was the inspiration for Xerox's subsequent computers and for Apple's Lisa and Macintosh. All graphical user interfaces owe their roots to the Star. See Alto, Lisa and Macintosh.
The Star User Interface
If the graphical interface and simulated desktop in this picture seem amazingly similar to the Macintosh and Windows, there is a reason why. That is where they both came from. (Image courtesy of Palo Alto Research Center.)