Abacus to Algorith Series Supplementary Resources

Burroughs full-key recording machine

Photo of an original 1890s Burroughs full-key recording machine for addition and multiplication

An original 1890s Burroughs full-key recording machine for addition and multiplication at the Polytechnic Museum in the Moscow Technopolis.

Photo by Александр Сигачёв. (CC 1.0)

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