Some of the earliest GUI used were mostly radars and they used light pens instead of using a mouse. Pretty much it is how a person can interact with computers. The Xerox Alto was the first to use the desktop metaphor and the mouse. Which was then followed by an upgraded version called Xerox Star. As of 1979, Steve Jobs then made the apple computers which were called Apple Lisa and Macintosh. The evolution of GUI interface have really shown like today's models such as Microsoft Windows, Mac OS X and X Window System. There are also new systems such as androids and blackberrys. Most of these ideas have been completely based off and inspired by the Xerox computers.
Also there are several examples of different GUI interface examples. These are such as the monitor screen which is an embedded industrial application which employ a real time operating system. Also others are simply searching the internet using a browser, you type in what you want to search for then the internet browser makes a list of suggested websites for you. This is a prime example of GUI interface. Restaurants are starting to use GUI interface now too with their Point-Of-Sale touch screen pads.
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