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Development of Desktop Calculators (7h 49min, jul 21, 1930 y – 19h 20min, may 23, 1960 y)
Description:
-made the transition from mechanical to electronic
Added to timeline:
31 Jan 2018
0
0
382
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Date:
7h 49min, jul 21, 1930 y
19h 20min, may 23, 1960 y
~ 29 years
