The MirOS BSD operating system (OS) was originally named MirBSD. It began as an OpenBSD 3.1 fork, in August 2002. It is intended to (1) maintain the security of OpenBSD, (2) better support European localisation. It synchronises code updates with OpenBSD often, and uses code from other free BSD variants: FreeBSD, NetBSD, MicroBSD. MirOS code has been used in ekkoBSD. One goal is to port MirOS to run on a Linux kernel. As are most BSDs, it is free.