1 jan 2400 ano antes da era comum - The invention of the Abacus

Descrição:

Description:
The Abacus was invented in Babylon in 2400 BC. It was a beaded tablet use for simple equations. Still in use in some parts of the world today.

Justifications for importance:
1. First "Automatic computer"
2. Started the rise of analog computers
3. Esentianly a calclator

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