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The abacus that we know of today first appeared around 1200 A.D. in China. No one particular person or group is considered to be the inventor as it likely evolved from various counting boards and bead systems over several centuries. ... « Who invented the first microscope?
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Abacus - Wikipedia, the free encyclopedia
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What is an abacus? An abacus is a device used for addition and subtraction, and the related operations of multiplication and division. It does not require the use of pen and paper, and it's good for any base number system. ... Timeline of the Abacus...
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Email Newsletter Name: China Trivia: When Was The Abacus Invented? Date Published: March 6, 2007; Below is a web version of the email newsletter that was sent to subscribers. Print This Page Email This Page;
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Yesterday I looked at China's annual economic report delivered by Premier Wen Jiabao. A major problem, mentioned in that post, for the Premier and the central Government is the lack of reliable ... You are on the invidual archive page of Invented the abacus but can't add up. Click Simon World weblog for the main page.
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