Select which Desktop Environment to use from the login screen.
KDE is a powerful graphical desktop environment for UNIX workstations. In other words, KDE is a collection of programs, technologies and documentation that attempt to make life easier for computer users. A user's guide can be found at users-guide.
The GNOME desktop environment, is an intuitive and attractive desktop for users, and the GNOME development platform, an extensive framework for building applications that integrate into the rest of the desktop. A user's guide can be found at users-guide