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Additional Pictures 

 

This printed circuit boards (PCBs) of a TI-2550 II (left) manufactured in February 1976 next to a TI-2550 III (right) manufactured in September 1976.


horizontal rule

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

© Joerg Woerner, November 13, 2022. No reprints without written permission.