freebsd is really bsd?

[LinuxIsOne]

On Tue, Dec 13, 2011 at 10:30 AM, Matthew Seaman
<m.seaman at infracaninophile.co.uk> wrote:

> Yes, it is really BSD: it is the direct lineal descendant of Unix code
> released by the University of California, Berkeley.  The beginnings of
> the FreeBSD project were based on the 386BSD code that ultimately came
> out of BSD 4.3 and 4.4.  See here, for instance:

> https://en.wikipedia.org/wiki/File:Unix_history-simple.svg

> "Free" in the sense of "available to use in any way the user may see fit
> and without onerous licensing terms or fees" -- that's implicit in the
> BSD part of the name[*].  Still, no harm in repeating ourselves.

> Besides, it was necessary to distinguish this project from NetBSD and
> later OpenBSD (plus various other more recent BSD variants).

>        Cheers,

>        Matthew

> [*] Although you can still be BSD, even under commercial licensing terms
> and closed source, but in that case, the name tends not to contain those
> letters.  eg.  SunOS (before v5), NeXTSTEP, MacOS X.

Oh I see. Thanks for the explanation.