The History Of Calculators

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Events

Approx. 2500 BC - Approx. 2000 BC
Approx. 190 AD - Approx. Present
1617 - 1642
1642 - 1673
1673 - 1820
1851 - 1970
1877 - 1960
1930 - 1961
1961 - 1964
1964 - Present