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5 janv. 1884 - Dorr Felt, Comptómetros.
Description:
El comptómetro fue la primera calculadora mecánica de tecla pulsada, de éxito comercial, patentada en los Estados Unidos en 1887 por Dorr E. Felt.
Ajouté au bande de temps:
Período Pre-Informático
By
Lowenski Matos
22 oct. 2017
0
0
775
Date:
5 janv. 1884
Maintenaint
~ Il y a 141 ans
Les images:
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