Gentoo Linux 12.1Description by the Software Developer:
"Gentoo Linux, a special flavor of Linux that can be automatically optimized and customized for just about any application or need. Extreme configurability, performance and a top-notch user and developer community are all hallmarks of the Gentoo experience.
Thanks to a technology called Portage, Gentoo Linux can become an ideal secure server, development workstation, professional desktop, gaming system, embedded solution or something else -- whatever you need it to be. Because of its near-unlimited adaptability, we call Gentoo Linux a metadistribution.
Portage is the heart of Gentoo Linux, and performs many key functions. For one, Portage is the software distribution system for Gentoo Linux. To get the latest software for Gentoo Linux, you type one command: emerge --sync.
This command tells Portage to update your local "Portage tree" over the Internet. Your local Portage tree contains a complete collection of scripts that can be used by Portage to create and install the latest Gentoo packages. Currently, we have more than 8000 packages in our Portage tree, with new ones being added all the time."