MirOS BSD originated as a patch set against OpenBSD-current, a 4.4BSD-derived ultra secure operating system. This release includes bugfixes and enhancements for many system components, including libc, ld.so, ntpd, make, and others. There is support for PowerNow on AMD Athlon / Athlon XP systems. libexpat is in the base system now. gcc support for C++ and other languages is still missing.