Zane H. Healy wrote:
  Let's see NT supported x86, Alpha, MIPS, and
what was the other
 family?  I want to say the 4th family was something from Sony, but
 can't remember.  Except for x86 the other three were basically one
 vendor support I think (granted Alpha was a couple others). 
 There was PowerPC at some time or another too. 
It still is. XBOX360 ;-)