Over the past four decades the computer industry has experienced lot of development from vacuum tubes, diodes and transistors to small and medium scale integration to large and very large scale integration. Increases in device speed, reliability and reductions in hardware cost, physical size have increased the computer performance. A modern computer system is a combination of items as processors, memories functional units, networks etc.
Today’s large computers would have been considered super computers 10 to 20 years ago. By the same way today’s super computers will be considered state of the art standard equipment 10 to 20 years from now. Quick and accurate results of various events at a time is the present trend.