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First Generation Computer:

The period of first generation: 1946-1959. Vacuum tube based.

Second Generation Computer:

The period of second generation: 1959-1965. Transistor based.


Third Generation Computer:

The period of third generation: 1965-1971. Integrated Circuit based.


Fourth Generation Computer:

The period of fourth generation: 1971-1980. VLSI microprocessor based.


Fifth Generation Computer:

The period of fifth generation: 1980-onwards. ULSI microprocessor based.



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