> capability based permissions, never really took off until decades later Didn't all the unices of the day have C2-secure (and even tighter) "orange book" vers

> capability based permissions, never really took off until decades later Didn't all the unices of the day have C2-secure (and even tighter) "orange book" versions? Windows as well I believe. And definitely some other unices. That's so long ago I don't recall but didn't starting at C2 require MAC and this implies some kind of privilege system. Solaris has had privileges (analogous to Linux capabilities) since 2005. Looks like Linux had it since 1999 but of more limited scope until 2008 when it got extended. So I'd say "a decade", not "decades". ;)