Kubuntu is an Ubuntu derived distribution with the K Desktop Environment (KDE). The Kubuntu CDs are made up of Ubuntu’s base plus KDE. You can get exactly the same effect by installing Ubuntu and adding the KDE packages from the Ubuntu archives. The desktop CD allows you to try Kubuntu without changing your computer at all, and at your option to install it permanently later. This type of CD is what most people will want to use. You will need at least 256MB of RAM to install from this CD. There are several other operating systems which are derived from Ubuntu, including local language versions and hardware-specific ones. Whether it is used in the home, at school or in an office Ubuntu contains all the applications needed, from word processing and email applications, to web server software and programming tools. Ubuntu will always be free to download, free to use and free to distribute to others. With these goals in mind, Ubuntu aims to be the most widely used Linux system, and is the centre of a global open source software ecosystem.