Pretty cool diagram:
http://upload.wikimedia.org/wikipedia/commons/7/77/Unix_history-simple.svg
... and the website from whence it ultimately came:
http://www.levenez.com/unix/
http://upload.wikimedia.org/wikipedia/commons/7/77/Unix_history-simple.svg
... and the website from whence it ultimately came:
http://www.levenez.com/unix/