Ubuntu is designed primarily for use on personal computers, although a server edition also exists. Ubuntu holds an estimated global usage of more than 12 million desktop users , making it the most popular desktop Linux distribution with about 50% of Linux desktop marketshare. It is fourth most popular on web servers, though its popularity is increasing rapidly.
Ubuntu is sponsored by the UK-based company Canonical Ltd., owned by South African entrepreneur Mark Shuttleworth. Canonical generates revenue by selling technical support and services related to Ubuntu, while the operating system itself is entirely free of charge.
The Ubuntu project is entirely committed to the principles of free software development; people are encouraged to use free software, improve it, and pass it on.
Ubuntu releases are also given alliterative code names, using an adjective and an animal (e.g., "Dapper Drake" and "Intrepid Ibex"). With the exception of the first three releases, code names are in consecutive alphabetical order, allowing a quick determination of which release is newer. "We might skip a few letters, and we'll have to wrap eventually." says Mark Shuttleworth while describing the naming scheme. Commonly, Ubuntu releases are referred to using only the adjective portion of the code