File:Using-an-Abacus-09.png

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DescriptionUsing-an-Abacus-09.png	English: A confusing phrase from the Shushu Jiyi (術數紀遺) by Xu Yue (徐岳), which perhaps dates from the 2nd century, is often quoted as describing a computing device that we could identify with an abacus and that has been interpreted in different ways as in the above figure (a). In this interpretation of a first Chinese abacus as a table abacus, the central part is divided into a series of columns with two parts; the upper one would assign a value of 5 to each bead and the lower one a value of 1, while the inactive (unused) beads wait scattered above and below the central part.
Date	14 September 2021
Source	Own work
Author	Jccsvq

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