Victor Mayer Amédée Mannheim (17 July 1831 – 11 December 1906) was the inventor of the modern slide rule. Around 1850, he introduced a new scale system that used a runner to perform calculations. This type of slide rule became known under the name of its inventor: the Mannheim. References Computer Museum, Kiel External links 1831 births 1906 deaths 19th-century French mathematicians 20th-century French mathematicians