Differences between CUI and GUI are as follows:CUIGUICUI stands for Character User Interface.GUI stands for Graphical User Interface.In CUI, user interacts with applications by making use of commands.In GUI, user interacts with applications by making use of graphics.Only one task can run at a time.More than one task can run simultaneously.A CUI will require less computer resources.e.g. MS-DOS.A GUI will require a lot of more system resources because each element that needs to be loaded such as icons, fonts etc. e.g. MS-DOS. e.g. Windows.