I have been running FreeBSD for a few years now, and have learnt to like its overall stability as well and its clean and elegant design. Sure, I'm still more of a Linux guy but there is a lot to like in the BSD family of Unices. Here I gathered some pointers to documentation and articles on that other opensource OS.



This is perhaps the most objective document I've ever read explaining what BSD is and hot it compares to Linux. Unlike the rants written by many other BSD fans, this author doesn't think twice before stating that an argument traditionally used by BSD fans is highly overrated.
The complete family tree of UNIX Research and BSD in a nice ASCII file that you can easily refer to. It goes very well with this other document written by James Howard and published by the DaemonNews guys.
FAQ for 86BSD, NetBSD, FreeBSD, OpenBSD and other BSD derived operating systems, including detailed information about specific hardware, performance issues, etc.
Written by Nikolai Bezroukov, the main published of SoftPanorama. A great document explaining the differents between the two licenses as well as the social consequences of both. The author definitely seems to like the BSD license better.     :-)
Online book with information on FreeBSD system programming, covering things like FreeBSD's make, how to bootstrap FreeBSD, kernel services, basic and advanced I/O, etc.