Julian R. Hall's _(Moscow | http://www.web-sites.co.uk/jules/moscow/) _(MIA) is about implementing an *(OS) as libraries of reusable and replacable _(object)s. Nothing has been released but design documents, now unaccessible, but a side effect of Julian's work on tools that would later help him realize his goal has been the development of the _(Netwide Assembler | http://nasm.sourceforge.net)(NASM), perhaps the best free assembler available.