CHM Revolution

Date Introduced

1900 ca.

Photographer

Richards, Mark

Dimensions

4 1/2 x 11 1/2 x 1 1/2 in.

Credit Line

Courtesy Gwen and Gordon Bell

Copyright Owner

© Mark Richards

Location

Korea

Keywords

Asia; Hand calculation; Mechanical calculation; Jupan (주판)

Object ID

B94.80

Originating from earlier Chinese tools, the Korean jupan evolved with fewer beads, improving efficiency, and became essential for education, commerce, and mental arithmetic practice.