Yes also BSD and friends.

From TFA

> These amendments redefine the term “operating system provider” to exclude any person or entity that distributes an OS or application “under license terms that permit a recipient to copy, redistribute, and modify the software.” Any software distributed under the GPL, MIT, BSD, and Apache licenses satisfies that test, which removes the likes of Debian, Fedora, Ubuntu, Arch, and the BSD family from AB 1856’s scope.

It's kind of weird though. Is VxWorks (a proprietary embedded OS used on some of the Martian rovers) going to require it in case some underage Martians try to use Facebook?

I'm sure they have a feature that also asks for species. Martians being longer lived than humans, they come of age at around 42.

That depends. Will some kid be caught accessing Facebook from a Martian rover, triggering a court case? Remember, the law only cares about things that actually happen.

According to the article: "it's any OS or application “under license terms that permit a recipient to copy, redistribute, and modify the software.”"

The article then explicitly cite "Debian, Fedora, Ubuntu, Arch, and the BSD family".

There is also another exclusion for libraries and software from a packages managers like apt and pacman.

So from my understanding ReactOS, hobby OS but also CP/M, FreeDOS, Haiku or Collapse OS...

They include the majority of OSI licenses, including BSD. So the majority of BSD variants are included.

Anything that’s open source