GNU/Linux and X Windows

I have been using primarily Ubuntu for quite some time now. That distribution is a GNU/Linux Operating system with Gnome desktop environment configuration of the X Windows. Canonical, that provides Ubuntu also has two other distributions: Kubuntu and Xubuntu.

I was poking around at those desktop environment's homepages, with a faint understanding of how it all fits. Recently, one of my KalaaLog.com reader who is a Linux user did a switch from KDE to Gnome (Kubuntu to Ubuntu).

My curiosity took over and hence I did a hunt on Google and have a list of links that I think I should be reading.

• X Window System
• X Window Manager
• Desktop Environment
• X Window System Architecture Overview HOWTO

 If you think I should be reading some more, do not hesitate to post links below. I intend to get a bird's eye view or basic understanding of the GNU/Linux and the X Window System architecture.