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1 gen 2000 anni a. C. - The Abacus

Descrizione:

This is hand operated mechanical calculator using beads on rods, first used by Sumerians and Egyptians around 2000 BC.

Aggiunto al nastro di tempo:

The Calculator

13 set 2017

0

0

683

Data:

1 gen 2000 anni a. C.

Adesso

~ 4028 years ago

Immagini:

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