Abacus (1 mar 2410 año aC – 1 ene 0 año)

Descripción:

Somewhere around this time span, the abacus is invented.
REASONS WHY THIS IS IMPORTANT:
1) The abacus is the earliest recorded instance of something that could be considered a computer
2) It remained in use until the 1990's, when calculators were sophisticated enough to be more useful
3) This tool shows that people have been creating ways to automate calculations for a very long time

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