The HEPEK

Kubuntu is an official derivative of the Ubuntu operating system which uses the KDE Plasma Desktop instead of the Unity graphical environment. As part of the Ubuntu project, Kubuntu uses the same underlying systems, every package in Kubuntu shares the same repositories as Ubuntu, and it is released regularly on the same schedule as Ubuntu. It is possible to install both the KDE Plasma Desktop and the Unity desktop on the same machine. Kubuntu was sponsored by Canonical Ltd. until 2012, and thereafter by Blue Systems. During the changeover, Kubuntu retained the use of Ubuntu project servers and existing developers. ... more on Wikipedia