trentbuck(a)gmail.com (Trent W. Buck) wrote: From thinking about the failure to remove all the bugs before the new version ; and the creation of new ones in the next; I started wondering whether anyone, was taking a fundamentally different approach; to " secure and bug free OS's". After all as OS's become larger and languages more powerful; then if error rates per 1000 lines of code stay roughly constant (to err is human ?); then source-code errors and security holes will become more numerous as the source increases in size ?; The prospect seems to be, we may never be certain that all the catastrophic ones a have been found, and (for example)our airplane won't fall out of the sky under rare and specific circumstances ? By chance I came across the following idea: http://files.qubes-os.org/files/doc/arch-spec-0.3.pdf I was wondering about peoples thoughts about this and the general problem ? regards Rohan Mcleod