1973 - Xerox Alto computer at the Xerox Palo Alto Research Center (PARC). First machine (demo) to use a mouse (primitive), and Ethernet protocol. The CPU sat under a desk; display, mouse, and keyboard sat on top. Steve Jobs toured the Xerox PARC facilities in 1979 and recognized the utility of the GUI. The design of Apple's Lisa computer was changed to be GUI-based. Xerox also developed a GUI machine called the Star for the mass market, but both machines were flops due to high prices.