jan 1, 1967 - Pocketronic

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"... the first IC based electronic calculator" (Jack Kilbey). The abacus had been adapted several times and eventually became the electronic calculator.

Jack Kilby. (2018). In Encyclopædia Britannica. Retrieved from https://academic-eb-com.ezproxy.umary.edu/levels/collegiate/article/Jack-Kilby/126152#214761.toc

Vintage Calculators: Issue No. 1 of "The International Calculator Collector". [Image]. On Vintage Calculators. Retrieved from http://www.vintagecalculators.com/html/ti_cal-tech.html.

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