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Abacus: First appearing as we know it today about 1200 A.D. in China, it evolved from a simple counting board. The oldest surviving counting board dates back to 300 B.C. and was used by the Babylonians. Calculator: The first electronic calculator dates back to the 1960s and was first developed by Texas Instruments. However, Blaise Pascal invented the first mechanical (that was non-electronic) calculator in 1642. | |
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Friday, March 25, 2011
Abacus > or < Calculator?
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