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Gnome. If you want KDE, you can use Kubuntu, the KDE derivative of Ubuntu.
Matthias Ettrich started KDE development in 1996.
KDE e.V.'s population is 1.
KDE Software Compilation was created in 1998.
The 2008 release shipped with KDE 3.5.7. The 2008.1 point release shipped with KDE 3.5.9.