Science has discovered many wonders and Computer is one of them.
Computer was not invented over night. It took long time and
hard labour to invent Computer. 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. 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 ENTACE
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 arithmetic unit.
A Computer performs three functions:-
1.
It
receives data
2.
It
process data by various computations
Computer is of great use to us. It readers great service to mankind.
It is like Aladdin’s magic lamp or magic wand. It has lessened our work loads
and made our life easy and comfortable. It is used in all spheres of our life
like education, medical science, agriculture, commerce, printing, industrial
sector etc.
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 repetitive stress injury and
weakens the eye sight of the operators.
Of late Computer has been
introduced in Bangladesh. May 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.
Sorters of Computer- a Computer can not running himself it need an
operator. An operator’s commend a Computer cannot
see. So a computer need two things one of them is operator and another is
programs or softer. There are many softer to running a Computer
sues as Microsoft Windows xp 2, Microsoft Windows xp 3, Microsoft Windows
vista, Microsoft Windows Make. Windows 7, Windows 8, Windows 10 etc. And there
many softer to working another wok. Those Sifters only run a P.C. But if we
need too done another works sues as any Graphics Design or any other hardly
programs then we must need another softer or programs.
Now we can know about
any subject by it. If we need to know about our any friends who live another
country so what we can eahsily tell and look him in P.C. by Internet. Before it
we can only tell him but now we not only tell but also look them.
Now Computer is of great
use to us. All the people of the world known and use Computer.
Now we cannot go a single moment without Computer.
It is part and parcel in our daily life.
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