Charles Babbage, a British Mathematics professor, is regarded as the Father of Computers. He was born in England in 1792 as the son of a rich banker from Devon. He was inspired by Napier's logarithm tables and Napier's logs and bones. He began to design a "difference engine" in 1821 which was a very large and complicated machine intended for doing logarithmic calculations automatically.
The device was based on the principle that the difference between certain values of the expression at a certain stage becomes constant. But it was difficult to make the machine parts accurate enough to prevent errors to occur, using the technology available at that time.
Encouraged by the work of "difference engine", he began design of another machine "the analytical machine", which could carry out many different types of calculations. Analytical engine used the concepts of Automatic Loom and Difference Engine.
The Analytical machine had five units- input, output, store, mill, and control. Store was used for storing numbers and Mill was used to do the calculations by rotation of gears and wheels. Control unit did the job of supervision of all other units. Note that these five units are similar to the functional units of a modern digital computer. No wonder he was called the "Father of Computers"!
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