Introduction: Computer is the most wonderful contribution of modern science. It is an ultra-modern electronic device of modern technology. But it has no ability to do anything by itself. It works on the basis of commands given by the operator. It can solve many complicated problems within a short time.
Invention and development: Computer was invented by the hard work of many scientists. Charles Bavez is called, the father of modern computer. He invented the structure of computer in 1833. His invented computer had five parts. These were Store, Mill, Control, Input and Output. By following the structure of computer of Bavez, Harvard University and I. B. M. company combindly invented the modern computer in 1944. After this, it has been rapidly modified and many other computers have been developed.
How It Works: A computer performs three functions. It receives data, processes it and at last emits it. At first the details of work is put into the input of the computer. It is called programme. The computer does not work in our language. So the programme is to be put in its own language. This programme is typed and produced in the tele-type unit of the information input. The output prints the results with the help of the printing machine.
Usefulness: Computer is a very useful thing to us. It is used in our daily life for various purposes. It has made a great change in education. The students of developed countries use computer to, prepare their study materials. The result of examinations now is prepared accurately by computer within a short time. Besides, printing books has been much easier for computer.
Computer is used to diagnose diseases. A new process of operation is invented by computer as an alternative to surgery. Beside this, computer is used to grind stones in normal pathological test.
Now-a-days, computer is used to prepare document and budget and to store information. The price of currency and price of any share can be known instantly by computer.
At present, computer is used to run mills, factories and industries in developed countries. Cars, trains and planes are also run by the computer. Computer is being used in space research.
Disadvantages: In spite of having innumerable merits of computer. it has also some demerits. It. weakens the eye-sight sight of the operator.
Conclusion: The computer is a blessing of modern science. Todays world cannot be imagined without computer. It lessens our labor and makes our work easy and simple. But computer has not been widely introduced in Bangladesh. So Govt. should facilitate its use all over the country.
