A GUI or a graphical user interface is an type of device interaction interface that you can use to navigate the computer visually. The most popular example of a GUI is Microsoft Windows. Almost all modern operating systems, as well as pieces of software have a GUI to help navigate and operate the software. A GUI is an alternative to entering text via Shell. Instead of typing in code, you use a mouse and a display to click.
History of GUIs
The first GUI was made by Alan Kay and Douglas Engelbart for Xerox at Xerox PARC (Xerox’s Research Center) in April 1973. It was the first system to have all the elements of a modern GUI. The system featured a bit-map display and a 3-button mouse. On January of 1983, Apple released Lisa. Surprisingly, Lisa’s development team included some former employees at Xerox PARC. In 1985, Windows 1, the first version of Windows, released to the public. It was a GUI version of the MS-DOS Operating System.