Origin of calculators
| 05:39 Feb 5, 2012 |
| English language (monolingual) [PRO] Tech/Engineering - Computers: Software / Calculators | |||||
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| 5 +1 | adding machine |
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| An 8,000 year old system: |
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Answers
1 hr confidence: 
peer agreement (net): +1
peer agreement (net): +1| origin of calculators adding machine Explanation: adding machine, arithmometer, comptometer - these are different names of a mechanical computing machine where calculations are performed by turning a handle which rotates interconnected discs with numbers -------------------------------------------------- Note added at 2 hrs (2012-02-05 07:41:00 GMT) -------------------------------------------------- sorry, disks, of course -------------------------------------------------- Note added at 2 hrs (2012-02-05 07:42:41 GMT) -------------------------------------------------- See pictures at: Arithmometer – Wikipedia de.wikipedia.org/.../Arit... - Ein Arithmometer ist eine mechanische Rechenmaschine, auf die der Franzose Charles Xavier Thomas de Colmar (1785-1870) im Jahre 1820 ein Patent erhielt ... |
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Reference comments
5 hrs |
| Reference: An 8,000 year old system: Reference information: See Japanese children learning to use the abacus and eventually using imaginary ones to do super-fast mental arithmetic. A video shows how a nine-year old with an imaginary abacus performs calculations three times faster than an adult with a calculator. Reference: http://www.youtube.com/watch?v=6m6s-ulE6LY Reference: http://www.youtube.com/watch?v=yj7XbnYrIk0&feature=related |
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