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Created by
Floofypanda
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Updated
15 Sep 2017
Timelines by
Floofypanda
:
25 Oct 2017
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114
Edgar Allan Poe
Edgar for English
Events
First Mechanical Calculator
Start period of the development of commercially successful mechanical calculators 1872
The first electronic desktop calculators 1961
Start if development of handheld calculators 1965
First battery powered, handheld, electronic calculator 1969
First calculator to use a microprocesser 1971
First solar powered and first credit card sized calculators 1978
Periods
Steady development of mechanical calculators -size reduction, electronic motor drive, and other added features 1900-1975
