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1. en.wikipedia.org › wiki › Charles_Xavier_ThomasCharles Xavier Thomas - Wikipedia

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   Charles Xavier Thomas de Colmar (May 5, 1785 – March 12, 1870) was a French inventor and entrepreneur best known for designing, patenting, and manufacturing the first commercially successful mechanical calculator, known as the Arithmometer.

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3. www.britannica.com › biography › Charles-XavierCharles Xavier Thomas de Colmar | Inventor, Calculator ...

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   Apr 30, 2024 · Charles Xavier Thomas de Colmar (born 1785, Colmar, Fr.—died 1870, Paris) was a French mathematician. In 1820, while serving in the French army, he built his first arithmometer, which could perform basic addition, subtraction, multiplication, and division.

   • Author: The Editors of Encyclopaedia Britannica

4. history-computer.com › people › thomas-colmarThomas de Colmar – Complete Biography, History, and ...

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   Jul 31, 2023 · Charles Xavier Thomas de Colmar was a French inventor and entrepreneur renowned for developing, patenting, and manufacturing the Arithmometer. The Arithmometer was the first commercially successful mechanical calculator. Thomas de Colmar was born on May 5, 1785, and died on March 12, 1870.

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   • Birth Date: December 27, 1990

5. www.historyofinformation.com › detailCharles Xavier Thomas - History of Information

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   In 1820 Charles Xavier Thomas of Alsace, an entrepreneur in the insurance industry, invented the arithmometer, the first commercially produced adding machine, presumably to speed up and make more accurate, the enormous amount of daily computation insurance companies required.

6. collection.sciencemuseumgroup.org.uk › people › cp28368Charles Xavier Thomas | Science Museum Group Collection

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   Known for the arithmometer (calculator); Born in Colmar, Alsace, France; Grew up to become founder and director of two Paris insurance companies, the Phoenix and the Sun. Was also the inventor of the first commercially succesful calculating machine and founder of the calculating machine industry.

7. home.csulb.edu › ~cwallis › labsThe Historical Development of Co

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   Charles Xavier Thomas de Colmar (1785-1870), a French industrialist, constructed and mass-produced the first calculator. Like Mueller, de Colmar began developing his idea while in the army.

8. www.educalc.net › page › 199482Charles Xavier Thomas - Arithmometer | Educalc.net

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   Charles Xavier Thomas (1785~1870) While serving in the French army, he built his first Arithmometer, which could perform basic addition, subtraction, multiplication, and division. Patented in France by in 1820 (two patents and two patents of addition in between 1849 and 1851).