The so-called desktop first appeared on a home computer in 1981, with the release of the Xerox 8010 Star Information System. That device pioneered the graphical-user interface, or G.U.I., a convenient series of visual metaphors that allows us to interact more easily with our machines. The most basic computing interface is the command-line prompt, the empty box in which users write instructions in code directly to the machine; the Xerox Star replaced that forbidding vacuum with a friendly illustration of a tabletop surface, textured in patterned pixels, scattered with icons for folders, spreadsheets, and filing trays. A 1982 paper on the device described the then novel system: “Users are encouraged to think of the objects on the Desktop in physical terms. You can move the icons around to ar

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