bsd is a family of operating systems, not one. I'm going to answer based on FreeBSD, the system I have more experience with. 1) yes it does, both as source and

bsd is a family of operating systems, not one. I'm going to answer based on FreeBSD, the system I have more experience with. 1) yes it does, both as source and as binaries (and the same for the base system itself) 2) not sure what you mean, but... (see next answer) 3) https://www.freebsd.org/doc/handbook/ https://www.freebsd.org/doc/handbook/ and the man pages. Back in 2000s, the FreeBSD handbook was the best documentation for unix based systems. I could bet a fiver this is still the case.