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Abacus: the first calculator

Abacus: the first calculator: An abstract picture of an abacus. It was invented in China and is considered one of the first calculators around the world.
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Abacus: the first calculator: An abstract picture of an abacus. It was invented in China and is considered one of the first calculators around the world.
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May 5, 2014 Yengineer

Using this great image in presentation on Science, Technology, Engineering, and Mathematics (STEM) education. Thank you for making it available!

January 13, 2010 saavem

Scientific calculator!

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Dimensions: 3840px * 2160px
Published: January - 12 - 2010
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