The earliest device that qualities as s digital computer is the abacus also known as sabosan this devices permits the users to represents number by the position of beads on a rack. Another manual calculating devices was john nophier bone. Charles Babbage a nineteenth century professor at Cambridge University is considered to be the father of modern digital computer. Babbage designed a different engine in the year 1882 which could produce reliable tables. In 1842 Babbage comes out with his new idea of analytical engine that was intended to be completely automatic. It was capable of performing the basic arithmetic function for any mathematical problems and it was to do so at an average speed of 60 additions per minutes. It was very complex in design and huge in size. It used over 3000 electricity actuated switches to control its operation and was capable of performing was approximately 50 feet long and 8 feet high. It was five basic arithmetic operation additions, subtraction, m...
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