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1 янв 1887 г. - Comptómetro
Описание:
Dorr Felt desarrolló su comptómetro, el cual fue la primera calculadora que se operaba con sólo presionar teclas en vez de, por ejemplo, deslizar ruedas.
Добавлено на ленту времени:
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Antonio
26 ноя 2018
0
0
306
Дата:
1 янв 1887 г.
Сейчас
~ 137 г назад
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