Ubuntu is a computer operating system based on Linux Kernel and is distributed as a free and open-source software. The word « Ubuntu » is an old African word meaning « humanity”. Ubuntu can be used on all types of PCs and can be downloaded  free of charge on the Ubuntu website. Ubuntu is very stable and secure; it has its own browser (Firefox), its own office application (OpenOffice), its own music player and much more. The Ubuntu Software Centre gives you instant access to thousands of open-source and carefully selected free applications.