MirOS BSD
| Screenshot of MirOS #10-current/i386 | |
| Developer | Thorsten Glaser, Benny Siegert, Ádám Hóka, others | 
|---|---|
| OS family | Unix, BSD | 
| Working state | Current | 
| Source model | Open source | 
| Initial release | OpenBSD-current-mirabilos #0 (October 11, 2002) | 
| Latest release | MirOS #10semel (March 16, 2008) [±] | 
| Latest preview | MirBSD-current (10uB4-20160117) (January 17, 2016) [±] | 
| Update method | Binary security updates for stable releases | 
| Package manager | MirPorts, pkgsrc | 
| Platforms | i386, SPARC | 
| Kernel type | Monolithic | 
| Default user interface | mksh, IceWM, evilwm | 
| License | Mostly BSD, GPL, MirOS Licence | 
| Official website | www | 
MirOS BSD (originally called MirBSD) is a free and open source operating system which started as a fork of OpenBSD 3.1 in August 2002. It was intended to maintain the security of OpenBSD with better support for European localisation. Since then it has also incorporated code from other free BSD descendants, including NetBSD, MicroBSD (owned by DamnSmallBSD) and FreeBSD. Code from MirOS BSD was also incorporated into ekkoBSD, and when ekkoBSD ceased to exist, artwork, code and developers ended up working on MirOS BSD for a while.
Unlike the three major BSD distributions, MirOS BSD supports only the x86 and SPARC architectures.