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Willgodt Theophil Odhner
Willgodt Theophil Odhner (in Cyrillic, Вильгодт Теофил Однер) was a Swedish engineer and entrepreneur, working in St. Petersburg, Russia. He was the inventor of the Odhner Arithmometer, which by the 1940s was one of the most popular type of portable mechanical calculator in the world.〔Trogemann G., Nitussov A.: ''Computing in Russia'', page 39-45, GWV-Vieweg, 2001, ISBN 3-528-05757-2〕
According to a brochure distributed by Odhner's company at the Paris World exposition of 1900 "...Odhner had, in 1871, an opportunity to repair a Thomas calculating machine and then became convinced that it is possible to solve the problem of mechanical calculation by a simpler and more appropriate way". It took him 19 years to perfect the design of this new machine so it could be manufactured effectively.
==Early years==
Odhner studied at the Royal Institute of Technology in Stockholm from 1864 to 1867 but left before graduating.〔 At age 23, in 1868, he moved to Saint Petersburg, Russia, even though he didn't speak any Russian. As soon as he arrived, he went to the Swedish consulate, which found him a job in a local mechanical workshop. A few months later he joined the Nobel's mechanical factory owned by a Swede named Ludvig Nobel (1831–1888), brother of Alfred Nobel of Nobel Prize fame, where he worked until 1877. In 1878 he joined the Expedition, a large paper mill and printing house, and worked there until 1892.
抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』
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