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COMPUTER GENERATIONS


                  After these early calculating machines, the present computer took its shape in five
                  generations.
                  First Generation (1940s)


                  Many computers were part of the first generation computers.
                  MARK-I


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



















                  ENIAC


                  The Electronic Numerical Integrator and Computer (ENIAC) was the first electronic
                  general-purpose digital computer. This computer was created in 1946 by  John
                  Mauchly and Presper Eckert. It had over 18,000 vacuum tubes and was 1,000
                  times faster than the Mark-I. ENIAC consumed nearly 200 kW of power.





















                         Boost Bits

                   The first electronic computer ENIAC weighed more than 27 tons and took up
                   1800 square feet.






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