Science has discovered many wonders and computer is one of them.
Computer was not invented over night. It took a 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 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 input unit, the output unit, the memory unit, the control unit and arithmatic unit.
A computer performs three functions:
1.It receives data
2.It processes data by various computations
3.It emits data.
Computer is of great use to us. It renders service to mankind. It is like Aladin 's magic lamp or magic wand. 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 blessings on earth. Everything has its dark sides. Computer has its own demerits. It causes diseases like Respitutive Stress Injury and weakens the eye sight of the oprators. of late computer has been introduced in Bangladesh. Many government and non- goverment 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 computer will be used in every sphere of life.
Computer is of great use to us. We can not go a single moment without computer. It is part and parcel in our daily life.
