A GUI is an acronym for “Graphical User Interface”. A GUI Operating System contains graphics and icons and is commonly navigated by using a computer mouse.
The first interactive user interfaces to computers were not graphical; they were text-and-keyboard oriented and usually consisted of commands you had to remember and computer responses that were infamously brief. The command interface of the DOS operating system is an example of the typical user-computer interface before GUIs arrived.
Today’s major operating systems provide a graphical user interface. Applications typically use the elements of the GUI that come with the operating system and add their own graphical user interface elements and ideas.
Elements of a GUI include such things as: windows, pull-down menus, buttons, sliders, scroll bars, iconic images, wizards, the mouse, and no doubt many things that haven’t been invented yet.
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