I found a nice grid here
http://bhami.com/rosetta.html#hardware but this does not show where each originated.
For instance at top level you have UNIX and Windows among others. FreeBSD and OpenBSD would be part of the same group for instance as would MAC as it was also developed by Berkeley along with the various BSDs. I need something that show's each level of development.
Does anyone know of a site that would show each level of the pyramid from the top few down.
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