Abacus
From Wikimedia Commons, the free media repository
Deutsch: Ein Abakus ist Hilfsmittel zum Ausführen verschiedener Rechenoperationen.
English: An Abacus is a calculation tool.
Galego: Un ábaco é un instrumento de cálculo.
Norsk (nynorsk): Ei Kuleramme er eit reknehjelpemiddel.
Русский: Абак, счёты.
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An abacus from a Danish elementary school. Early 20th century.
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A Chinese (top) and a Japanese (bottom) abacus
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A Russian abacus
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Reconstruction of a Roman abacus
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Image of an abacus from Encyclopedia Britannica
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A Chinese abacus
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A big Chinese abacus
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A long Chinese abacus
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A Japanese soroban
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German abacus
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An example of addition using an abacus
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A Chinese abacus (top) and a Japanese abacus (bottom). Despite the appearances, both are actually made in Mainland China.
[edit] Abacus in art
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Hokusai, 1760
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