There is also a nice Unix family tree there: http://www.levenez.com/unix/ http://www.levenez.com/unix/ As it includes Linux, AIX, HP-UX, Solaris, HURD, OS X an

There is also a nice Unix family tree there: http://www.levenez.com/unix/ http://www.levenez.com/unix/ As it includes Linux, AIX, HP-UX, Solaris, HURD, OS X and their derivatives, the graph is huge but very interesting!