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Xerox Alto

1973 Year

Xerox Alto was the first truly modern personal computer, it had number of firsts including graphical user interface (GUI), desktop, mouse. Apple, Sun and later Microsoft derived/copied heavily from this design. Xerox Alto was never commercial product, but 2000 were built, used at PARC and some universities. Specs: 2.5MB cartridge, upto 512kB memory, TI 74181 CPU.