Generation of Computer | Basic of Computer

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COMPUTER BASIC

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Generation of Computer

There exist 5 computer generations till date. In the following list, approximate dates against each generation have been mentioned, which are normally accepted.
These five generations of computer are based on their processing hardware.

Generations	Period	Techonology
First generation	1946 - 1956	Vacuum tube-based
Second generation	1956 - 1965	Transistor-based
Third generation	1965 - 1971	Integrated circuit
Fourth generation	1971 - 1980	VLSI micro-processor based
Fifth generation	1980 - onwards	ULSI micro-processor based

Another topics...

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• Advantage of computer.
• Classification of computer.
• Basic block of computer.

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First generation

• The period 1940 to 1956, roughly considered as the First Generation of Computer.
• The first generation computers were developed by using vacuum tube or thermionic valve machine.
• The input of this system was based on punched cards and paper tape; however, the output was displayed on printouts.
• The first generation computers worked on binary-coded concept (i.e., language of 0-1). Examples: ENIAC, EDVAC, etc.




Second generation

• The period 1956 to 1963 is roughly considered as the period of Second Generation of Computers.
• The second generation computers were developed by using transistor technology.
• In comparison to the first generation, the size of second generation was smaller.
• In comparison to computers of the first generation, the computing time taken by the computers of the second generation was lesser.




Third generation

• The period 1963 to 1971 is roughly considered as the period of Third Generation of computers.
• The third generation computers were developed by using the Integrated Circuit (IC) technology.
• In comparison to the computers of the second generation, the size of the computers of the third generation was smaller.
• In comparison to the computers of the second generation, the computing time taken by the computers of the third generation was lesser.
• The third generation computer consumed less power and also generated less heat.
• The maintenance cost of the computers in the third generation was also low.
• The computer system of the computers of the third generation was easier for commercial use.




Fourth Generation

• The period 1972 to 2010 is roughly considered as the fourth generation of computers.
• The fourth generation computers were developed by using microprocessor technology.
• By coming to fourth generation, computer became very small in size, it became portable.
• The machine of fourth generation started generating very low amount of heat.
• It is much faster and accuracy became more reliable.
• The production cost reduced to very low in comparison to the previous generation.
• It became available for the common people as well.




Fifth generation

• The period 2010 to till date and beyond, roughly considered as the period of fifth generation of computers.
• By the time, the computer generation was being categorized on the basis of hardware only, but the fifth generation technology also included software.
• The computers of the fifth generation had high capability and large memory capacity.
• Working with computers of this generation was fast and multiple tasks could be performed simultaneously.
• Some of the popular advanced technologies of the fifth generation include Artificial intelligence, Quantum computation, Nanotechnology, Parallel processing, etc.