Unix distros - where they originate from

This is a tree showing how various Unix distros originated from.

Unix

--Linux

----RPM (Red Hat Linux)

------Fedora

------Cent OS

------SuSE

------Mandriva

--------PCLinux

----Debian

------Ubuntu

--------gOS
--------PinguyOS
--------EasyPeasy

--------Linux Mint

------Mepis

------Maemo

------Linspire

------Knoppix

--------Damn Small Linux

----Gentoo

----Slackware

------Puppy Linux