Museum of Science, Tokyo University of Science / Japanese abacus 1
The Museum of Science, Tokyo University of Science was established in 1991. The building is a reconstruction of the original wooden building constructed in 1906 that housed the Tokyo College of Science. The permanent exhibit presents the history of computing devices including abacuses, calculators, and computers. (For more information, see the February 2013 issue of the PR magazine pla-topia.) http://www.tus.ac.jp/info/setubi/museum/
Japanese abacus 1
Speaking of calculating tools, the Japanese abacus was used in Japan for a long time. The abacus has originated from China. A replica of a grooved abacus from the Roman era is on display in the museum, by which calculation is made by sliding barbell-shaped beads along grooves of a bronze plate.
