Bazaar is a version control system that helps you track project history over time and to collaborate easily with others. Whether you're a single developer, a co-located team or a community of developers scattered across the world, Bazaar scales and adapts to meet your needs. Part of the GNU Project, Bazaar is free software sponsored by Canonical.
Ubuntu is a computer operating system based on the Debian GNU/Linux distribution and distributed as free and open source software. It is named after the Southern African philosophy of Ubuntu (“humanity towards others”).
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, and its popularity is increasing rapidly.
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.