A computer is an electronic machine that can store, organize and find
information, do calculations, play music and games and control other machines.
It also can perform many other functions. It has no capacity to do anything by
itself. It works on the basis of commands given by the operator. The invention
of computer has a long history. It was not invented overnight. It took a long
time and hard labour to invent computer. A computer has five major components.
They are the input unit, the output unit, the memory unit, the control unit and
the arithmetic logic unit. A computer performs three basic functions. Firstly,
it receives data. Secondly, it processes data by various computations. And
thirdly it emits data. It helps us doing our gigantic and complex works within
a surprising short time. It can also help us finding out data and information.
It has eased modern life to a considerable extent. We watch many recreational
programmes on it at our leisure period. So, it helps us in many ways making our
work easy and enjoyable. We can study computer at different institutions both
at home and abroad. If we just want to know the elementary uses of computer, we
can take the help of any renowned computer training centre. But if we want to
have or gain a greater idea of computer, we should get ourselves admitted to a
university to study computer science. Nowadays at every institutions, government
and non-government, such as bank and insurance, commercial enterprises,
retailers, offices, educational sectors, medical science etc., computer is a
must. It is like Aladin’s lamp. We cannot go a single moment without computers.
It is now a part and parcel of our daily life.
পিডিএফ ফাইল ডাউনলোড করতে নিচের ডাউনলোড বাটনে ক্লিক করুনঃ
