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AZTEC ABACUS
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).
Aztec Abacus
Copyright © 2002 by Macmillan Reference USA, an imprint of the Gale Group
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