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Chisanbop

American  
[chiz-uhn-bop] / ˈtʃɪz ənˌbɒp /
Mathematics, Trademark.
  1. a system for performing basic arithmetic calculations, especially addition, by counting on one's fingers in a specified way.


Etymology

Origin of Chisanbop

< Korean chi- finger + san ( p ) pǒp calculation, < Middle Chinese, equivalent to Chinese zhǐ suànfǎ