Debian Pure Blends

"Debian Pure Blends - in short Blends if used clearly in the Debian internal context which makes "Pure" and "Debian" obvious - which were formerly known as Custom Debian Distributions (this name was confusing because it left to much room for speculation that this might be something else than Debian) try to provide a solution for special groups of target users with different skills and interests. Not only do they provide handy collections of specific program packages, but they also ease installation and configuration for the intended purpose.

Debian Pure Blends are not forks from Debian. As the new name says clearly they are pure Debian and just provide a specific flavour. So if you obtain the complete Debian GNU/Linux distribution, you have all available Debian Pure Blends included."

http://cdd.alioth.debian.org/blends/

http://cdd.alioth.debian.org/blends/ch-about.en.html#s-Blends