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Microsoft Wiki

A graphical user interface (GUI) is a user interface that incorporates graphical elements, such as windows, icons, and buttons – unlike a command-line interface (CLI), which is text-based.

The first commercially available GUI was called "PARC," and was developed by Xerox for its 8010 Information System, released in 1981. Apple Inc. co-founder Steve Jobs saw the interface during a tour at Xerox and had his team developed an operating system with a similar design – Apple's Mac OS was released in 1984, with Microsoft's first GUI-based operating system, Windows 1.0, releasing the following year.[1]

The Windows XP graphical user interface.

The GUI on Windows 3.1.


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