GNU/Linux distribution timeline

  I recently found an interesting image about the History of all the Linux distributions displayed in a timeline graphic.


(click on the image to see the original picture)

Linux is mainly 3 distributions: Debian, Slackware and Red Hat. They mainly differ by their packaging system (Red Hat: rpm, Debian: deb, Slackware: tgz).
It is unbelievable how hundreds of distributions have been created from them.