Source : Free On-Line Dictionary of Computing

end-user
     
         The person who uses a computer application, as opposed
        to those who developed or support it.  The end-user may or may
        not know anything about computers, how they work, or what to
        do if something goes wrong.  End-users do not usually have
        administrative responsibilities or privileges.
     
        End users are certain to have a different set of assumptions
        than the developers who created the application.
     
        (1997-03-29)