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thumb|upright=1.3|Arithmomètre built by Louis Payen around 1887
thumb|upright=1.3|Arithmomètre built by Louis Payen around 1887
The arithmometer () was the first digital mechanical calculator strong and reliable enough to be used daily in an office environment. This calculator could add and subtract two numbers directly and perform long multiplications and divisions effectively by using a movable accumulator for the result.
Discovered by embedding cosine similarity (sentence-transformers MiniLM, 384-dim).