Inventions in the Smithsonian Institution

small piece of paper with a re-adherable strip of glue on its back

thumb|upright=1.3|Arithmomètre built by Louis Payen around 1887

American inventor (1838–1914)

thumb|upright=1.2|Model ST (1930s) thumb|upright=1.2|Prototype of the first all-electronic desktop calculator marketed by of the United Kingdom|UK