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 capability to do anything by itself. It works on the basis of the commands given by the operator.
Computer was not invented overnight. It took a long time and hard labor to invent computer. Many scientists tied but failed to invent computer. First of all Pascal invented the theory of Digital Calculating System in 1641 though his attempts were not crowned with success. Finally Mr. Howard H.Aiken, an American scientist came up with ASCC in 1944. After that many computers have been invented such as EDSAC in 1945 etc.
A computer consists of five major components. They are :
- Input Unit.
- Output Unit.
- Memory Unit.
- Control Unit.
- Arithmetic Logic Unit.
A computer performs mainly three functions:
- Receives Data.
- Processes data by various computations.
- Emits Data.
Computer is of great use to us. It is like an Aladdin’s Magic Wand or Magic Lamp. It varies from machine to machine. It also renders great service to mankind. We can not go a single day without it. It is a part and parcel of out daily life.
Mrittika DebClass V
YWCA Higher Secondary Girls’ School