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Additional Pictures 

 

The sales box of the PS-9000 Back-Up Memory Module sold around 1993 in the US.

This PS-9000 Back-Up Memory Module was manufactured in June 1993 by 
Texas Instruments in Italy (Date code RCI 210693 June 21, 1993).


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If you have additions to the above article please email: joerg@datamath.org.

Joerg Woerner, October 23, 2009. No reprints without written permission.