Computers are-machines that accept incoming data process them and produce outputs-depending on the users' applications.
Present time, we are so much associated with these devices that without them we would not be able to live the way we do. They play a crucial role in everybody's life. They bring a major socio-economic revolution not only in India but also in the whole world itself. From pocket calculators to personal computers (PC), food processors and microchips entering through VCRS at home, their uses are manifolds.
The computers are employed to assist men in business organizations, in space and other researches and in many other walks of life. The personal computer (PC) is marching into the office where it is improving productivity by replacing paper works, customer services and job satisfactions for some.
Why Computers are used widely?
The computers process information's that come in all shapes and sizes from any fields so accurately that, some people may call these "Informatics"— The Science of Informal ion Processing, i.e. the methods of recording, manipulating and retrieving information's. It may be from a mathematical equation to a company's work-force necessary to produce a payroll or from meteorological department to forecast tomorrow's weather or from space research to project a new space craft. Whatever may be the case, why computers are used widely?
The following characteristics that make the computers very popular for its multifarious uses may give the befitting reply.
First, the computers are regarded as high speed calculators. They can process voluminous data within a fraction of second which no human being could do earlier. If we want tomorrow's forecast today, meteorologists can use the computers for necessary calculations and analyses. The units of speed of a computer are the microsecond, the nano (10)-9 second and even the picot second.
As human brain can store the knowledge in memory and can able to recall it, the Central Processing Unit (CPU) of a computer can do the same job without any failure. But the internal memory of CPU is only large enough to retain a certain amount of information. So, to store each and every information inside the computer, an Auxiliary or Secondary Storage Device is being attached outside the memory of the CPU.
The computers are much popular due to their high speed along with consistently very high accuracy. Sometimes, the machinery may give errors, but due to increase in efficiently error-detecting techniques, these seldom lead to false results. Most of the errors in computers are due to human himself.
Once a programme is in the computer's memory, it will start processing the input information's; thus leading to automation.
The computers are versatile in nature. They can perform any task given to them provided they are well programmed,
Being a machine, a computer is very diligent in its duties. It never suffers from human fatigue and tiredness or lack of concentration. It can perform thousands after thousands calculations with exactly same accuracy and speed as the first one without any rest.