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Additional Pictures 

 

The printed circuit boards (PCBs) from four different SR-51 Scientific Calculators.
SR-51 Engineering Sample (upper left), SR-51 First Design (upper right),
SR-51 Clear-Case Prototype (lower left), and SR-51 Second Design (lower right).


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

© Joerg Woerner, January 21, 2024. No reprints without written permission.