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Issue No. 01 - January (2010 vol. 32)
ISSN: 1058-6180
pp: 34-43
<p>Two almost forgotten keyboard calculators, the first by the Milanese Luigi Torchi (1834) and the second by the Florentine Tito Gonnella (1858), demonstrate technical features much ahead of their time. In particular, Torchi's calculators seems to incorporate possibly the first direct-multiplication mechanism.</p>
Keyboard mechanical calculators, direct multiplication, 19th century, Italy
Silvio Hénin, "Two Early Italian Key-Driven Calculators", IEEE Annals of the History of Computing, vol. 32, no. , pp. 34-43, January 2010, doi:10.1109/MAHC.2010.27
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