I had seen this a while ago, a brief diagram of Unix history, on Éric Lévénez's site: https://www.levenez.com/unix/ https://www.levenez.com/unix/ The page als

I had seen this a while ago, a brief diagram of Unix history, on Éric Lévénez's site: https://www.levenez.com/unix/ https://www.levenez.com/unix/ The page also has some Unix history and related links.