Additional Pictures 


This Bowmar 901B and its identical twins Commodore C110 and Craig 4501 (from left to right).

This earliest electronic calculator manufactured by Texas Instruments with the Klixon keyboard:  Longines Symphonette EC, Montgomery Wards P800 and Radio Shack EC-100 (from left to right).

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Joerg Woerner, October 30, 2021. No reprints without written permission.