4. X Window System   

The X Window System is a software system that allows programmers to develop portable graphical user interface applications. This section will introduce you to the X Window System and detail some of its advantages and disadvantages.

The following topics are discussed: 



       What is the X Window System?  
       Why X?  
       History of the X Window System  
       Why not X?  
       Interface Styles  
       Clients and Servers  
       Choosing the DISPLAY
Surprise!!

The next section is concerned with Xlib - a low level X library.