Computer
Science has discovered many wonders and computer is one of
them. It is an ultra modern electronic device for storing and analysing
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. So the credit for the invention of modern computer goes to Howard Akin.
After seven years electric computer was used in Harvard University in 1944.
After that many other computers have been invented such as EDSAC in 1945 and
ENTANCE in 1946 etc. A computer consists of five major components. They are the
input unit, the output unit, the memory unit, the control unit and the
arithmatic unit.
A computer performs three functions 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 language is not fixed. It varies from
machine to machine. Programmes written in machine languages are machine
dependent and they are only good for that particular machine.
Of late computer has been introduced in Bangladesh. Many
government and non-government offices, educational institutions are using
computer. A course on computer has been introduced in secondary and higher
secondary levels. The day is not far to come when computers will be used in
every sphere of life.
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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