Computer Generations

1. History
of
Computer

2. Asearly as the seventeenth century,
mathematicians were trying to create a
machine that could perform basic
mathematical functions
such as,
 addition,
 subtraction,
 division and
 multiplication.

3. 1804 British inventor, Charles
Babbage, designed an all-purpose
problem-solving machine, the
difference engine, which had a
mechanical memory to store the
results of calculations.

4. Generations of Computer
First Generation
1946-1955: Vacuum Tubes
The first computers used
vacuum tubes for circuitry
and magnetic drums for
memory, and were often
enormous, taking up entire
rooms.
The UNIVAC and ENIAC
computers are first-generation
computing devices.

5. Some pictures: First Generation

6. Transistors replaced
vacuum tubes and ushered
in the second generation of
computers. The transistor
was invented in “1947 but
did not see widespread use
in computers until the late
50’s.They are smaller,
faster and cheaper.
Second Generation - 1956-1965: Transistors

7. Some pictures: Second Generation

8. The development of the
integrated circuit was the
hallmark of the third
generation of computers.
Transistors were miniaturized
and placed on silicon chips,
called semiconductors, which
drastically increased the
speed and efficiency of
computers. First Integrated Circuit
Third Generation - 1966-1975:
Integrated Circuits

9. Some Pictures : Third Generation

10. Fourth Generation - 1976-1990:
Microprocessors
The microprocessor
brought the fourth
generation of
computers, as
thousands of
integrated circuits
were built onto a
single silicon chip.

11. Some Pictures: Fourth Generation

12. Fifth Generation 1990 to
present
Fifth generation computing
devices, based on
artificial intelligence, are
still in development,
though there are many
applications that are being
used today.

13. Some Pictures : Fifth Generation