Abacus - Research Article from Macmillan Science Library: Computer Sciences

This encyclopedia article consists of approximately 2 pages of information about Abacus.
This section contains 41 words
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Archaeologists have discovered that the Aztec culture used a counting device similar to the Asian abacus. The Aztec abacus (c. C . E . 900–1000) consisted of a wooden frame on which were mounted strings threaded with kernels of maize (corn).

This section contains 41 words
(approx. 1 page at 300 words per page)
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Macmillan Science Library: Computer Sciences
Abacus from Macmillan Science Library: Computer Sciences. Copyright © 2001-2006 by Macmillan Reference USA, an imprint of the Gale Group. All rights reserved.