Ubuntu

Super-fast, easy to use and free, the Ubuntu operating system powers millions of desktops, netbooks and servers around the world. Ubuntu does everything you need it to. It'll work with your existing PC files, printers, cameras and MP3 players. And it comes with thousands of free apps. An operating system is what makes your computer work, running all your programs and managing your hardware. Other examples include Microsoft Windows and Mac OS X. With Ubuntu, you can do all the things you can do with other operating systems. But with Ubuntu you can do them faster, more securely and, of course, for free.