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What is Computers ?

What is  Computers?

The 21st century is witnessing a technological integration in the world of computers, communication and electronic gadgets in which information processing and transfer are done at incredible speeds with the potential of controlling them from remote desktops. 

Today microprocessors can be found in children's toys, word processors, pocket calculators, industrial robots, home appliances, etc. - to mention a few of their innumerable users and there is practically no new machine, instrument, control equipment or information system that doesn't have a microprocessor in it. Computers of yesteryears were analogue and present day are digital machines. Those converting numbers into physical quantities, which can vary continuosly within a range were called  analog computer, while those using numbers, (which are discrete values)are called digital computers. There used to be a third class of computers called hybrid computers which had digital storage and switching but in them calculations in an analog fashion. 

While analogue computers were for specific scientific/technological operations- such as harmonic analysis, solution of simultaneous algebraic and polynomial equations, solutions of differential equations etc. (In fields such as hydrodynamics, aerodynamics, serodynamics, industrial control, etc. ), The digital computers were universal in that they had application not only in the scientific field but also in the fields of business, administration and home. Further, technological advances have been fast. The most widespread and population computer are called personal computer. 

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