First Generation Of Computers (1940-1950)

  • In this computer used vacuum tube.
  • Machinery language added in this computer.
  • Consume a lot of electricity.
  •  Very slow and very large in size.
  • Used punched cards and paper tape.
  •  There were about 100 different vacuum tube computers produced between 1942 and1963.

     Second Generation Of Computers (1950-1960)

    • Used magnetic core and tapes.
    • Assembly language used.
    •  Generated less heat.
    •  Improve the speed this computer.
    • Used punched cards.
    • Examples  IBM 1401, IBM 7090 and 7094, UNIVAC 1107 etc.

      Third Generation Of Computers (1960-1970)

      • Use a integrated circuits (ICs).
      •  High level language (FORTRAN, BASIC, Pascal, COBOL, C, etc.)
      •  Improve the speed.
      • Used output devices like monitor, printer, etc.
      • Examples like IBM 360, IBM 370, PDP-11etc.

         Fourth Generation Of Computers (1970-present)

        • Used (VLSI) and microprocessor.
        •  Used RAM, ROM.
        • Fourth generation is better than third.
        • In this computer speed is very nice.
        • Used both devices input and output like mouse,printer,scanner etc..

          Fifth Generation Of Computers (the present and the future)


            Main electronic component: based on artificial intelligence, uses the Ultra Large-Scale Integration (ULSI) technology and parallel processing method

          • Language – understand natural language (human language).
          • Power – consume less power and  less heat.
          • Speed – remarkable improvement of speed, accuracy and reliability (in comparison with the fourth generation computers).
          • Size – portable and small in size, and have a huge storage capacity.
          • Input / output device – keyboard, monitor, mouse, trackpad (or touchpad), touchscreen, pen, speech input (recognise voice / speech), light scanner, printer, etc.


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