1 янв 1968 г. - Hewlett Packard 9100A
Описание:
1968The 9100A was the first scientific calculator by the modern definition, i.e., capable of trigonometric, logarithmic (log/ln), and exponential functions, and was the beginning of Hewlett-Packard's long history of using Reverse Polish notation (RPN) entry on their calculators.
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Дата:
1 янв 1968 г.
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~ 57 г назад