FreeBSD architecture diagram

[Diomidis Spinellis]

I've tried to put together a rough diagram of the FreeBSD architecture. 
It's based on the corresponding books by Maurice Bach and 
McKusick/Neville-Neil, plus my personal categorization of manual pages 
and some source code browsing.  You can find it online at 
https://dspinellis.github.io/unix-architecture/.  I'd very much welcome 
any feedback you may have regarding important errors or missing 
elements.  You can send feedback by email or through the GitHub repo 
that contains the diagram's source code: by opening issues or through 
pull requests.  If there's interest I'd be happy to maintain it as a 
project of our community.

Kind regards,

Diomidis