53 Computer -- Generations of Computer

What is meant by computer generations ?

1 Answers

The phase wise development of computers on the basis of speed electronic component, performance and specific period is known as computer generations.

Write down different computer generation with their duration and main component.

Different computer generations, their duration and main components are :

Generation	Duration	Main Component
First	1946 - 1958	Vacuum Tube
Second	1959 - 1964	Transistor
Third	1965 - 1974	IC (LSI)
Fourth	1975 - 1990	IC (VLSI)
Fifth	Present and Beyond	Biochip

List the disadvantages of first generation computers ?

The disadvantages of first generation computers are :-

They are huge in size.
They generate a great deal of heat .
They consumes large quantities of electric power.
They had very limited memories and processing capacities.

What is Bio-chip ?

Biochip is main electronic circuit of fifth generation computers made up of large organic molecules and genetically engineered protein to create an artificial cells.

What is super conductor ?

Super conductor is an ultrafast electronic circuit which will be used in fifth generation computers that will increase the capability of computer up to million of times.

Write the features of second generation computer.

The features of second generation computers are :-

Transistor are used as main component.
They generate less heat and consumed less electric power.
Their speed was up to microsecond.
They used assembly language for programming.
They were smaller in size than first generation.

Difference between third and fourth generation computers.

Third Generation Computer	Fourth Generation Computer
1. It used LSI as main component.	1. It used VLSI as main component.
2. Third generation computers used high level language for programming	2. Fourth generation computer sophisticated high level language for programming.
3. The size of third generation computers was up to microcomputer.	3. The size of 4^thgeneration computer is reduced up PDA, palmtop, laptop etc.
4. Operating speed of 3^rdgeneration computer was up to Nano second....

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