A Quote from the website:
"What is Ubuntu?
Ubuntu is a community developed operating system that is perfect for laptops, desktops and servers. Whether you use it at home, at school or at work Ubuntu contains all the applications you'll ever need, from word processing and email applications, to web server software and programming tools.
Ubuntu is and always will be free of charge. You do not pay any licensing fees. You can download, use and share Ubuntu with your friends, family, school or business for absolutely nothing. "
Home of Ubuntu, the free Operating System based on Debian Linux. Provides features and security which trump any and all variants of Windows, and yet remains astonishingly user-friendly. Highly recommended, very easy to install, and supported by a very large, and very helpful, community of experts.
The website about Ubuntu - on of the most user-friendly Linux distributions. You can download an ISO image and burn it on a CD, or, if your Internet connections is slow, buy Ubuntu CD or request a free CD (with no shipping costs!).
Ubuntu can be used as a primary OS or along with Windows. Thanks to Wubi it can be installed and removed like normal Windows application.
You can try Ubuntu without actually installing it - just boot it from a CD. Windows users, try Ubuntu out and you will see how great operating system Linux is! And it's free - you can give a copy to your friends and install it on as many computers as you want, with no license fees or legal consequences!
Oh, there is also a netbook edition of Ubuntu.
Ubuntu is an open source software platform that runs everywhere from the smartphone, the tablet and the PC to the server and the cloud.