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

                 UNIVAC

                 UNIVAC or Universal Automatic Computer, was another successful invention of
                 John Mauchly and Presper Eckert in 1951, which could handle both numeric and

                 textual information. The UNIVAC had 5200 vacuum tubes.

























                                                               UNIVAC


                    Features of First Generation Computer


                        Huge in size.
                        Very expensive.

                        Made up of vacuum tubes.

                                                                                                 Vacuum tube
                 Second Generation (1950s)

                 After  1955, the use of  transistors and  magnetic
                 tapes changed the image of the electronic computer.
                 During this period, the major computer manufacturers

                 began to offer a range of accessories such as: Page
                 Printers, Cathode Ray-Tube display, Card Feeders,
                                                                                            Magnetic tape
                 etc. They were smaller, faster, more reliable, and more
                 energy-efficient.








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