GUI stands for Graphic User Interface. As can be defined by the name, GUI is an interface with the help of which a user can interact with the device. Previously computers didn’t support GUIs, so working with computers required a lot of skills as every action can only be performed by using some basic commands that have to be remembered. So, you must have figured out that the computer was only a working tool back then. Some of the well-known GUI’s examples include Microsoft Windows, macOS and Ubuntu.