Charles Babbage, FRS (26 December 1791 – 18 October 1871)[2] was an Englishmathematician, philosopher, inventor, and mechanical engineer who originated the concept of a programmable computer.[3] Parts of his uncompleted mechanisms are on display in the London Science Museum. In 1991, a perfectly functioning difference engine was constructed from Babbage's original plans. Built to tolerances achievable in the 19th century, the success of the finished engine indicated that Babbage's machine would have worked. Nine years later, the Science Museum completed the printer Babbage had designed for the difference engine, an astonishingly complex device for the 19th century. Considered a "father of the computer",[4] Babbage is credited with inventing the first mechanical computer that eventually led to more complex designs.
Alan Mathison Turing, OBE, FRS (pronounced /ˈtjʊərɪŋ/ TYOOR-ing; 23 June 1912 – 7 June 1954), was an English mathematician, logician, cryptanalyst and computer scientist. He was influential in the development of computer science and providing a formalisation of the concept of the algorithm and computation with the Turing machine, playing a significant role in the creation of the modern computer.[1]
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