Alto

…the project that developed the Alto, the first personal computer, in 1973. Alto used a bitmap display in which everything on the computer screen was, in effect, a picture and had a graphical user interface in which programs were shown in windows that could be manipulated by using a mouse.…

…by PARC researchers, including the Alto, the first personal computer; the graphical user interface; the laser printer; and Ethernet, a ubiquitous computer networking technology.

…GUI operating system called the Alto and eventually introduced a commercial version called the Xerox Star in 1981. Xerox’s efforts to market this computer were a failure, and the company withdrew from the market. Apple with its Lisa and Macintosh computers and then Microsoft with its Windows operating system imitated…