Xubuntu, Kubuntu, Lubuntu and Edubuntu are official versions of Ubuntu (or its official derivatives). They mostly differ by the sets of preinstalled apps and desktop environments they use. Meanwhile, they share the same technologies and software repositories of the Ubuntu project. Ubuntu is the main version using GNOME desktop environment. Xubuntu is a version of the Ubuntu distributive with Xfce desktop environment. Kubuntu uses Ubuntu packages as the basis for KDE desktop environment. While the main idea for GNOME desktop environment was simplicity of operation, the KDE developers intended to implement a menu to deal with a maximum number of various settings. Lubuntu is the most lightweight version of Ubuntu distributive: the desktop environment it uses has minimum system requirements and is still easy to work with. Edubuntu is a specialized Ubuntu distributive containing specific software meant for schools and education establishments.