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Na6 abaque

Roman Abacus - Showing reversed rightmost columns, with column upside-down, Computer Museum, University of Tokyo.

Roman writing instruments.

Roman Stylus: 6 types in iron or bronze Point used for writing on wax-covered wooden tablets; wedge side used for erasures. From various sites in London.

vintage wooden japanese soroban abacus 1/5 bead style by 24pont, $16.00

vintage wooden japanese soroban abacus 1/5 bead style by 24pont, $16.00

abaque romain  Fabriqué en ivoire, sable, pierre, bois... Instrument pour le calcul

abaque romain Fabriqué en ivoire, sable, pierre, bois... Instrument pour le calcul

In, Spinning, Medieval, Accessories

A Roman Abacus from nearly 1 Century CE.

Roman Abacus - Numbers from a different point of view - A Roman version of the Babylonian abacus that greatly reduced the time needed to perform basic arithmetic operations using Roman numerals.

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