Object class: Data processing equipment / Culture or time period: East Asian cultures - Hearst Museum Portal Search Results

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Hearst Museum object titled Abacus rules, accession number 9-21432a-d, described as Abacus rules in two volumes (second volume now in pieces). Paper, stitched. 13.5 x 20.5 cm. a) Single plain piece of paper, apparently back cover to second of two volumes. b) One volume with pink cover sheet, intact. c) Main pages of second volume. d) Pink cover for second volume.