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5 gen 1884 anni - Dorr Felt, Comptómetros.

Descrizione:

El comptómetro fue la primera calculadora mecánica de tecla pulsada, de éxito comercial, patentada en los Estados Unidos en 1887 por Dorr E. Felt.

Aggiunto al nastro di tempo:

Período Pre-Informático

ByLowenski Matos
22 ott 2017
0
0
705

Data:

5 gen 1884 anni
Adesso
~ 141 years ago

Immagini:

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