gigabyte (GB): About a billion bytes of computer storage, or 1,024 megabytes. graphical user interface (GUI): Pronounced “gooey.” Using icons, menus, and a mouse as the method of interacting with a computer. The Apple Macintosh introduced in 1984 was the first commercially successful computer to employ a graphical user interface. hard drive: Also a hard disk drive. A built-in device that stores the programs and files on your computer. A hard disk drive contains round, mirrorlike platters made of glass or aluminum that spin to store and retrieve information. hardware: The physical parts of a
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