It was thus said that the Great Chris Kennedy once stated:
  Gordon JC Pearce wrote:
   But what
machines could run the that today? 
 Anything you port it to.
 Seriously, I bet *someone* out there will have a crack at it.  It can't
 be that hard, can it? 
 
 That's an interesting question.  I can't think of that many machines
 with a hardware ring architecture,  
  I can think of several thousand that have been made over the past decade,
all made with the Intel x86 architecture.  It even has the segments that
Multics used.  Seems like a perfect match to me.
  -spc (Maybe Multics was just a bit early?)