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Additional Pictures 

 

This HP-45 Programmable Scientific Calculator was manufactured in January 1977 by
Hewlett Packard in Singapore (Date code 1704S » wk 04 yr 1977).
The HP-55 is powered by 3 AA-sized rechargeable batteries.


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

© Joerg Woerner, December 3, 2023. No reprints without written permission.