![]() During the next five years, the price of RAM chips fell enough to accommodate the huge memory demands of bit-mapped graphics, and the Mac was followed by dozens of similar interfaces for PCs and workstations of all kinds. In 1984, the low-cost Macintosh from Apple Computer Inc., Cupertino, Calif., brought the friendly interface to thousands of personal computer users. ![]() From the Alto’s concepts, starting in 1975, Xerox’s System Development Department then developed the Star and introduced it in 1981-the first such user-friendly machine sold to the public. More than 1200 Altos were built and tested. In 1973, PARC developed the prototype Alto, the first of two computers that would prove seminal in this area. ![]() Throughout the 1970s and early 1980s, many of the early concepts for windows, menus, icons, and mice were arduously researched at Xerox Corp.’s Palo Alto Research Center (PARC), Palo Alto, Calif.
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