<em>GUI provides simple and easy way to operate computers. </em>
<u>Explanation:</u>
Before <em>GUI there were only CUI (Character User Interface) where the user needs to remember lots of commands to interact with computer </em>and it is also time consuming.
<em>Eg. DOS (Disk Based Operating System). </em>
This problem was overcome by GUI where it contains buttons where the user can use the <em>mouse to click, double click or right click </em>according to the options provided by the environment. <em>GUI is the successor of CUI.</em>