On Sat, 21 Aug 2010, William Donzelli wrote:
  Pretty much, yes. I suppose the
"youngest" mini architecture is the
 RS/6000, since it originally was made of multiple gate arrays (seven
 maybe?). 
 ISTR the RS/6000 (68000?) being called a microcomputer.  But it was out of
 my price range. 
RS/6000 isn't 68k based.  It's POWER-based.  The "R" in
"RS/6000" stands
for "RISC".
Peace...  Sridhar