Introduction: We live in an age of science. Science is inventing wonder after wonder-magic after magic like ‘ALADIS’ magic lamp. It has made impossible possible. We feel the impact of science almost in every walk of our life. Computer is one of the most wonderful inventions of modern science. Computer has come forward to work as a substitute for human brain.
Invention of computer: computer is fairly recent invention of modern science. It has brought about a revolutionary change in the history of human civilization. Of course, it was not invented overnight. It took invent computer. Computer was invented by an English mathematician called ‘Charles Babbage’. He invented two types of computer called analytical engine and differential engine in 1830. But these two computers were not perfect. Later, Professor Howard akin of Harvard University invented the modern computer in 1944.
Components of computer: computers have five major components: 1) input unit, 2) output unit, 3) memory unit, 4) control unit, 5) arithmetic unit. They mainly perform the functions of addition, subtraction, division, multiplication and comparison. There are three processes of functioning of a computer. A) Receiving data, b) computing data and c) emitting data. Electronically computers are of two basic types: analog and digital. Analog computers deal with physical qualities and digital computers deal with numbers. Every computer has language of its own which is called programming language. Machine language is not fixed. It varies from machine to machine.
Uses of computers: computer works wonderfully and effectively. The fastest computers can handle millions of problems in a few seconds. It can solve complex mathematical problems quickly and accurately. It can also perform many operations at one and the same time without any confusion. Many are the uses of computer in out life.
Educational sector: computer is the most important media of education in developed countries. The students of developed countries use computer to prepare their study materials. They learn many a thing within the shortest possible time. The results of various examinations are prepared accurately with the help of computer within the shorts span of time. The results of various examinations are prepared accurately with the help of computer within the shortest span of time.
Medical sector: computer has opened a new era in the field of medical science. Now-a-days it is used to diagnose diseases. Many critical operations are done successfully with the help of computer. It is used to grind stones normal pathological tests.
Agricultural sector: computers are also used in the field of agriculture especially in the developed countries. A farmer sitting in his house can complete the whole process of cultivation starting from the sloughing of the land to the thrashing of corn. What is he to do? He is simply to put on the switch.
Commercial sector: now-a-days trade, business and commerce cannot be thought of without computer. It works wonderfully in this respect. It is used in preparing documents, making list of storing up information and preparing budget etc. The value of currency and price of any share can be known instantly by computer.
Printing sector: today printing cannot be thought of without computer. It is an indispensable part of printing. A book which needed more than two months to get composed and published by a letter press now need not more than two days by computer within a very short time.
Industrial sector: computer has made its way to enter into the industrial sectors too. It is used in developed countries to run mills, factories and industries. Trains and planes are also run by computer.
Banking sector: modern banking system could be impossible without computer. Computer keeps accounts, processes bank checks, carry out fund transfers and other operations. It also checks income tax returns.
Translation sector: computer is also used in translation sector. It has been used in soviet Russia in translating the news of the soviet newspaper the ‘Pravda’ since 1990. It has thus paved the way to enrich to store house of knowledge by translating form one language to another.
Source of income: computer has also created a source of income. Many developed and advanced countries have got engaged in computer business. They earn a lot of foreign currency by exporting software and hardware.
Other sectors: computer has brought new speed and accuracy to weather forecasting. Space exploration would be impossible without computer. It can play chess or even compose music. This why many people call it is an “electronic brain”.
Computer in Bangladesh: computer has become very much popular in Bangladesh. It has already occupied an important place in the mind of the people. Our young generation is very much conscious of computer education. They are receiving training on computer learning with great enthusiasm. To need their increasing demand of computer learning, many training centers have been set up. It is now being used in many important offices for various works. It is also being used in banking sector, printing sector, industrial sector, agricultural sector and the like. Computer as a subject has been introduced in our schools and college. Thus Bangladesh has progressed much in many-sided words of life and living. The day is not far to come when we shall use computer in every sphere of our life. It is expected that the use of computer will go a long way to solve many of our hitherto unsolved problems. Our governments already had taken decision toe set up digital campus all over the country with a slogan ‘be science-devoted and march forward’. We hope that Bangladesh will be able to step into a new era called ‘digital Bangladesh’.
Demerits: there is nothing on earth which is an unmixed blessing. Computer is not also free from dark sides. It causes reparative diseases and weakens the eye-sight of the operators. The most dreadful effect of using computer is the creation of unemployment problem. It is just like stabbing on the throat of a dying patient and putting him to death. Still then, computer is the dire necessity of the day.
Conclusion: computer is really a great blessing for making. We cannot think of our life today with the existence of computer. Let me quote the words of P.B Shelley,
“The triumphant of a prophecy, O’ wind,
If winter comes, can spring be far behind?”