Computer uses and abuse-Composition

                               Computer Uses and Abuse

Science has discovered many wonders and computer is one of them. It is an ultra modern electronic device for storing and analyzing information fed into it. It has no capacity to do anything by itself. It works on the basis of commands given by the operator.

Computer was not invented over  night. It took long time and hard labour to invent computer. Many votaries of science worked hard. Thus computer is the result of hard labour of many votaries of science. First of all pascal invented the theory of "Digital Calculating System" in 1642. Though his attempts were not crowned with success, he initiated the research which paved the way to the invention of computer. Finally Mr. Haward Akin, an American scientist invented such a machine in 1937 that could do difficult sums. 

A computer consists of five major components. They are the input unit, the output unit, the memory unit,the control unit the  arithmetic unit. 

A computer performs three function: 1. It receives data, 2. It processes data by various computations, 3. It emits data.

Every computer has a machine language of its own and accordingly a computer functions. Machine languages are machine dependent and they are only good for that particular machine.

In the Developed countries computer is used to run mills, factories and industries. Trains and planes are run by the computer.

Computer is a source of great income. Many developed and advanced countries export software and hardware and earn a lot.

There is no unmixed blessing on earth.Everything has its dark sides. Computer has its own demerits. It causes diseases like Respective stress injury and weakens the eye sight of the operators.

Of late computer has been introduced in Bangladesh. Many government and non-government offices, educational institution are using computer. A course on computer has been introduced in secondary and higher secondary and higher levels. The day is not far to come when computer is of great use to us. We can not go a single moment without computers. It is part and parcel in our daily life. 

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