How computer came into existence and useful in present generation

Computers became cheap and are now easily available in the computers stores. Also there is a drastic increase in its sales. Computer is a modern electronic tool which has made the human life very easy and simple. Computers is the word derived from Computing, which means programmed for carry out set of arithmetic or logical operations. It became a part of every individual life. They are not just electronic devices, that are the basic needs for everyone in their daily life. Now there is a situation where there is no life without computers. At the very initial stage computers are very large that are of room size. Now it came to palm size which can easy to handle the computer functioning and carry to anywhere, any time. In 1981 IBM introduced its first computer for the home user.

Five generations of computers:

First Generation (1940-1956) Vacuum Tubes
Second Generation (1956-1963) Transistors
Third Generation (1964-1971) Integrated Circuits
Fourth Generation (1971-1985) Microprocessors
Fifth Generation (Present and Beyond) Artificial Intelligence

First computer image

Computers are being used for various purposes. It is used for multitasking like weather forecasting, machinery operations, guidance of spacecraft and technology. Apart from these in the medical sector for storing of patients and treatment information. They are also in Educational institutions, Banking sector, e-ticket booking , traffic controllers ,Sensor networks, E-commerce etc.  The characteristics of a computer posses such as speed, accuracy, reliability and integrity made it such a necessary element of our lives. A billions of  instructions are executed per second without committing any mistakes. The memory of the computer is so vast that it could hold in a large amount of data. Now a days everywhere computer occupies a prominent place without the computers the work can't be done. Super computer are the fifth generation which works as humans and work faster than human brain.

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