Paul Rogers wrote in a message to Roy J. Tellason:

PR> Maybe someday I can bore you with a description of the S360/91 32K
PR> water-cooled memory modules, back in the days when it was an
PR> acknowledged "super computer".

RJT> What did they make them out of,  discrete components?

PR> 600ns & 900ns CORE memory, little ferrite donuts.  It takes
PR> real energy to flip those magnetic domains, 

Yeah,  I remember seeing parts spec'd to do that,  and they always seemed
to play up the current-handling capabilities of those parts.

PR> but at least it was legitimate to refer to those devices as 
PR> "memory".  The SLT chips of the late 60's were roughly equivalent 
PR> to SSI.

One of the things I always found interesting about core was that if for
some reason you lost power,  and if the particular machine supported it, 
you could power back up and pick up exactly where you left off...

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