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Its inventor is unknown. However, the abacus as we know it today did not appear in China until about 1200 A.D. An Abacus is a device used for addition and subtraction, and the related operations of multiplication and division.
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sawaal.ibibo.com/computers-and-technology/define-abacus...
sawaal.ibibo.com/computers-and-technology/define-abacus-382316.html
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Session 2, Paper 3, Proceedings Symposium on the Mechanisation of Thought Processes, Teddington, Middlesex, England, The National Physical Laboratory, Nov. 1958, Her Majesty's Stationary Office (HMSO), pp. 232-255. PDF "Written at a distance of one year after the delivery of the first FORTRAN processor for the 704,
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www.softwarepreservation.org/projects/FORTRAN/
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; Biography about ten unknown heroes? ... ; The abacus was unknown in china until what year? ... ; Who won the 1997 white house news photographers' association photographer of the year award?
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wiki.answers.com/Q/FAQ/452-301
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Fig. 2--A late Roman abacus, whose source is unknown. This bronze piece of uncertain date ... The earliest type of abacus in China seems to have been the "bamboo rods" that served instead of counters. These were known as early as the 6th century B.C. and they survived in Korea until the close of the 19th century (fig.
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webpages.charter.net/BrianOtte/encyclopedia_project/a/a...
webpages.charter.net/BrianOtte/encyclopedia_project/a/abacus.html
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Abacus - Wikipedia, the free encyclopedia
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The abacus , also called a counting frame , is a calculating tool used primarily in parts of Asia for performing arithmetic processes. Today, abacuses are often constructed as a bamboo frame with ...
en.wikipedia.org/wiki/Abacus
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Language tends towards clunkiness when you fit, say, "aardvarks" and "abacus" into the same line, ... 3. "inactive" to-do cards (each card is dedicated to a different project, and if a project doesn't have any currently "active" task it gets considered dormant until I figure out what the next task is); ... Once again: a new year,
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www.imaginaryyear.com/raccoon/2006_01_01_archive.html
www.imaginaryyear.com/raccoon/2006_01_01_archive.html
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Until little over one hundred years ago China had remained so isolated from the world that she felt no need of a port to which foreign vessels could bring their cargoes. ... Hankow is the centre of China's tea trade, and during certain months of the year the streets are fragrant with a delicate perfume of drying tea.
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www.talesofoldchina.com/library/herlife.php
www.talesofoldchina.com/library/herlife.php
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China has a very old seafaring tradition. ... The technique was unknown in Europe until the 1800's, when it was introduced by Doctor Louis Pasteur. ... The Chinese developed the abacus, a counting device, around 100 AD. By the 1300's it was perfected and given the form it still has today. The instrument consisted of a...
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www.vhinkle.com/china/inventions.html
www.vhinkle.com/china/inventions.html
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The abacus as we know it today did not appear in China until about 1200 A.D. Over time the abacus traveled to Japan and evolved into what it is called today: the soroban.
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www.nurtureminds.com/faqs.htm
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