Cheryl Marble
cherylmarble
Hand-held Calculator - 1967
A major improvement on the abacus and much larger versions of calculators, these can perform simple math functions all the way to calculus equations. © JoeHaupt / Wikimedia Commons / CC-BY-SA-3.0
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Uploaded on November 30, 2015
Hand-held Calculator - 1967
A major improvement on the abacus and much larger versions of calculators, these can perform simple math functions all the way to calculus equations. © JoeHaupt / Wikimedia Commons / CC-BY-SA-3.0
1,696
views
0
faves
0
comments
Uploaded on November 30, 2015