The Abacus: A Brief History - Electrical and Computer Engineering Dept. Ryerson University

The Abacus: A Brief History - Electrical and Computer Engineering Dept. Ryerson University

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日期:2024-08-04
Circa 1600 A.D., use and evolution of the Chinese 1/5 abacus was begun by the Japanese via Korea. In Japanese, the abacus is called soroban. The 1/4 abacus, a style preferred and still manufactured in Japan today, appeared circa 1930. The 1/5 models are r...看更多