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A '''graphical user interface''' (or '''GUI''', often pronounced "goo-ee") is a method of [[human-computer interaction|interacting with a computer]] through a metaphor of direct manipulation of graphical images and
The graphical user interface was invented by researchers at the [[Stanford Research Institute]] (including [[Douglas Engelbart|Doug Engelbart]]) for use in the [[On-Line System]]. The concept was greatly refined and extended by [[Xerox PARC]], which used it as the primary interface for the [[Xerox Alto]] [[computer]]. Most modern general purpose GUIs are derived from this system. For this reason some people call this class of interface a PARC User Interface (PUI). The PUI consists of graphical [[widget]]s such as [[window (computing)|windows]], [[menu (computing)|menu]]s, [[radio button (computing)|radio button]]s, [[check box]]es, and [[icon (computing)|icon]]s, and employs a [[pointing device]] (such as mouse, trackball, or touchscreen) in addition to a keyboard. For this reason, many people refer to PUIs as WIMPs (Windows, Icons, Mouse, Pointer). Widgets are often provided in the form of [[widget toolkit]] libraries.
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