Welcome to the wonderful world of the computers!Computers are one of the greatest achievements of mankind.computers were generally considered to be very large and expensive curiosities that would have a little impact on the day-to-day lives.However, the rapid rate at which IT is currently advancing and the wide range at which computers are available at maximum efficiency at minimal costs, it has made a very big difference to one and all.From their beginning in science laboratories and research establishments,computers have become essential for modern business and industry.Today, their presence is felt in all walks of life.
A few examples of their usage are Railways and airways reservation,students marks processing,weather forecasting,producing movies,music for entertainment,better medical care for patients.
They are not only used for processing information, but also for innumerable other uses.So, the question that arises in our mind is what is a computer? A computer can be best described as fast and accurate data manipulating machine,designed to accept and store data, process them and produce results under the direction of a stored set of instructions.It is much more than a fast calculator.It can also perform many additional tasks like copying,moving,comparing and also non arithmetic operations.It accepts user data and instructions,stores data,performs logical operations,outputs them to the user on the screen or any other apt device, transfers data and much more.