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COMPUTER GENERATIONS


                  After these early calculating machines, the modern computers took shape in five generations.


                       First Generation (1940s)

                  Many computers were part of the first generation computers.


                  MARK-I (The First Electro-Mechanical Powered Computer)

                  In 1944, Prof. Howard Aiken built the first electro-mechanical computer named Mark-I. It
                  used punched cards and a typewriter for input and output. Mark-I was much more reliable
                  than early electronic computers.




















                                                                 Mark-I

                  ENIAC—The First Electronic Computer

                  Electronic Numerical Integrator And Computer (ENIAC), was the first electronic general-
                  purpose digital computer built in 1946 by John Mauchly and Presper Eckert. It contained over
                  18,000 vacuum tubes and was 1000 times faster than Mark-I. ENIAC consumed almost 200 kW
                  of power.

























                                                                 ENIAC

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