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jan 4, 500 BC - Abacus (counting frame) Counting tool that consists of beads or disks that can be moved up/down to assist in counting or keeping track of data
Added to timeline:
History of computer Project
By
Emily DeVore
20 Oct 2017
0
0
476
Date:
jan 4, 500 BC
Now
~ 2527 years ago
Images:
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