On April 19, Russ Blakeman wrote:
  HOT day here, musta been rambling, although I'm
not sure they even classify
 the 390 as a mainframe - most literature and such refers to it as a server. 
  The do indeed classify the S/390 as a mainframe...because, well,
that's what it is.  :-)
  The 390 architecture is an evolution of, and is largely compatible
with, the S/370 family and related architectures...which (as far as I
know, I'm not a mainframe expert..yet!) started with the S/360 back in
the 1960s.
        -Dave
--
Dave McGuire                                 "Mmmm.  Big."
St. Petersburg, FL                                -Den