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sep 11, 3001 BC - Abacus

Description:

The Abacus was used in Babylon 2000 years before the Greeks used it to help with calculating. To use it, you slide the beads up and down on the rods to add and subtract. It is used today in some countries.

Added to timeline:

9 Oct 2017
0
0
133
Rohan's Lit Timeline
About the advancement of computers

Date:

sep 11, 3001 BC
Now
~ 5023 years ago
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