Generally there are two way one can interact with an application software( or software) to work. The first methods where the user enter a command to work with it.


                    For example, One can use the PRINT command to send a file from computer to printer. If it is the case, the user clearly know about the syntax and semantic of the PRINT command.Then only they can interact with PRINTER and Computer. This process is known as Character User Interface(CUI).



              The main disadvantage of CUI is that, If you don't know, what is used and how they can be used if is not possible to work with this type of systems. It's not a user friendly. Every one can have good knowledge to work with it.


 The second way is where the user need not remember any command but interact with any application by click on some image or some graphics.

         For examples, if a user want to print a file, they can simple click on the print icon/button. Here is no need to learn any thing in advance and it is easy to work. This type of environment where the user interact with application throw graphics or images is called GUI(Graphical User Interface)

Advantages of Graphical User Interface

                                                      A Graphical User Interface has the following advantages

1. It is user friendly
2.It adds look and feel for working
3.It helps to create graphical components

    

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