Charles Babbage was an English mathematician, philosopher, inventor and mechanical engineer. Considered by some to be a "father of the computer", Babbage is credited with inventing the first mechanical computer that eventually led to more complex electronic designs. Parts of Babbage's uncompleted mechanisms are on display in the Science Museum in London. In 1991, a perfectly functioning 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.

Source: Wikipedia