"One of the first things people see when looking at Linux is the
desktop, or Graphical User Interface (GUI). Unlike most other
operating systems such as MS Windows, BeOS and MacOS, with Linux
(and UNIX) you have a choice of which GUI to use. Additionally, you
have the ability to change the look and feel of any of the
"Unlike MS Windows, BeOS and MacOS, where the GUI is an
integral part of the operating system, the graphical environment in
Linux is made up of a bunch of pieces."
"The bottom-level piece is called the X Window System..."
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