Berkeley Software Distribution (“BSD”) releases

The following are operating systems that heavily use code based on the old “Berkeley Software Distribution” releases of code.

The main operating systems most often associated with BSD (OpenBSD, FreeBSD, NetBSD) support the pkg-add suite (pkg-add, pkg-info, pkg_delete) of tools. (sp???)

[#openbsd]: OpenBSD
[#freebsd]: FreeBSD
[#netbsd]: NetBSD
[#drflybsd]: DragonFly BSD
In August 2008, Note about DragonFly BSD support for GPT stated this support was “very experimental”.
[#darwin]: Darwin-based
The Darwin-based release which was the first to reach substantial popularity would be the Mac OSX line of operating systems released by Apple.
[#miros]: MirOS

Review this info for accuracy: As I understand , this has had a few different approaches. In at least one release, the code was based on OpenBSD but contact information was not fully updated, so computers booting this code displayed a message to contact Theo DeRaadt (the leader of the OpenBSD project) as the contact for this OS. That was interesting because Theo DeRaadt was not involved with creating this variant of the operating system, so the MirOS ended up violating a basic principles of support: Never direct users to support from a source that has no intentions of supporting the product. Results may not be what is expected.

[#oldbsd]: MirOS Older, commercial, discontinued BSD operating systems
386BSD, BSD/386, BSD/OS. SunOS versions 4.x and earlier (prior to SunOS 5.x/Solaris which Wikipedia's page comparing BSDs says “is based on SVR4”). MidnightBSD has several licenses used by MidnightBSD, and from the Wikipedia article on MidnightBSD, this BSD seems related to FreeBSD.