Charles Babbage was an English polymath. A mathematician, philosopher, inventor, and mechanical engineer, Babbage, along with Ada Lovelace, is best remembered for originating the concept of a programmable computer.

Considered by some to be a “father of the computer,”  Babbage — along with Lovelace — is credited with inventing the first mechanical computer that eventually led to more complex designs. His varied work in other fields has led him to be described as “pre-eminent” among the many polymaths of his century.

Parts of Babbage’s uncompleted mechanisms are on display in the Science Museum in London. 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. (Reference: Wikipedia)