On Aug 24, 2014 5:47 PM, "Clem Cole" <clemc@ccc.com> wrote:

> btw.   CMU responded to 4.2 by taking the ideas from Accent and rewriting then and splicing them into BSD kernel to create Mach.      Which lives today as the core of both Mac OSx and iOS

And of course, before that, nextstep/openstep... and, well, hurd.  ;-)