Reference Entry

abacus

Christopher Clapham and James Nicholson

in The Concise Oxford Dictionary of Mathematics

Fifth edition

Published in print January 2014 | ISBN: 9780199679591
Published online September 2014 | e-ISBN: 9780191759024
abacus

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A counting device consisting of rods on which beads can be moved so as to represent numbers.

http://abacus.etherwork.net/Lee/ A description of how one abacus works....

Reference Entry.  26 words. 

Subjects: Pure Mathematics

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