History of the computer

Definition of the Computer.
A computer is a machine that manipulates data
according to a set of instructions .
A computer is a programmable machine that
receives input, stores and provides output in a
useful format, they can be constructed out of
almost anything.

Father of the Computer.
Charles Babbage, a British Mathematics Professor.
He regarded as the father of computer.
He was born in England in 1792 as the son of a rich banker from
Devon.
He began to design a difference engine in 1821.

Abacus.
Abacus is the first known device used for calculation.
It was invented by Chinese more than 5000 years ago.
The abacus was made of a wooden frame with poles attached to
it.
It is a calculator used by manually sliding bids along rods.

First Generation.
 First generation computer’s duration was 1940-1956.
 Vacuum tubes was the electronic technology used in first generation.
 Eniac was the first electronic digital computer.
 It used about 18,000 vacuum tubes.
 It size was too much large as room.
 The first generation computer produces too much heat.

Second Generation.
 Second generation’s duration was 1956-1963.
 Transistors was the electronic technology used in second generation.
 Storage capacity of computer also increase during this generation.
 Second generation computers also started showing the characteristics of modern day
computers with abilities such as printers, disk storage and operating system.

Third Generation.
Third generation’s duration was 1964-1971.
In third generation computer transistor were replaced
with Integrated circuit.
This generation machine uses magnetic tape and magnetic
disk secondary storage devises.

 Fourth Generation.
Fourth generation’s duration was 1971-future.
In fourth generation computer Integrated circuit were replaced with
Microprosser.
Computing speed increased.
Due to this reduction of cost and the availability of the computer power at a
small place allowed everybody user to benefit.

Napier Bones.
 John Napier is the worlds first calculator.
In 1617, the last year of his life, Napier invented a tool called
Napier Bones.
It is useful for multiplication and division.
And also this rod has 10 rods.

Arithmometer.
A mechanical calculator invented by Thomas De Colmar.
The first reliable, useful and commercially successful calculating
machine.
The machine could perform the 4 basic mathematic functions.
The first mass-produced calculating machine.

Tabulating Machine.
Tabulating machine was an electromechanical machine.
The machine were invented by Herman Hollerith.
This machine was developed to help process data for the 1890
census.
Tabulating machine was another name called Hollerith tabulating
machine.

History of the computer

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