We have operating systems for which remarkably few known exploits have ever been found. VMS now "open" and recently running in a VM on Xeons. I have always su

We have operating systems for which remarkably few known exploits have ever been found. VMS now "open" and recently running in a VM on Xeons. I have always suspected that the silence that resounded suddenly about security prowess of VMS coincided with the release of extensive POSIX compatibility layers and the vaunted ports of years old open source nix wares as a excuse to play buzzword bingo at that time. But anyone writing a native VMS application I'd firmly embraced by a deep architecture designed to provide accounts for the time when DEC silicon and their own leading fab was creating a explosion in processing power and the number of users capable of being supported by a OS that has still incredibly well integrated system programming tool chain languages including Digital BASIC that can do about anything BLISS can low level. This virtually (sorry) made it a overnight imperative to get the security right and tight. Alpha had hardware security rings almost certainly to give VMS the chance to serve the maximum number of users and steal account wins.