An arithmometer is essentially a old school calculator. It's mechanical, rather than computerized, like today's calculators.
Charles Xavier Thomas, of France, is credited with starting the calculating and accounting machines industry when he introduced the arithmometer in the 1870s.
Leibniz is well known for his development of calculus independently of Isaac Newton. In the 20th century his Law of Continuity and Transcendental Law of Homogeneity were found to have mathematical implication and the binary number system was also refined thanks to him. Finally, he invented the Leibniz wheel which is used in the arithmometer. Most of his contributions are to do with both science and mathematics, although he is most known for developing calculus.
the first mass produced calculator is the arithmometer developed by Charles xavier thomas de colmar in 1820 in France. this device performed the same type of computations with leibniz's stepped reckoner but was more reliable
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The CD was invented in 2001 Thomas clamps invented it.
invented in 500BC before electricity was invented
Gloria Mejia invented it and she invented it in 1998
When and where were snickerdoodles invented Why were snickerdoodles invented
who invented the washboard?
Yes, the computer is invented.
Invented is the past participle of the verb invent. verb /past /past participle = invent /invented /invented