2. PRESENTED BY
SYEDA ADIN AJAZ
37

3. EVOLUTION OF
COMPUTER
EVOLUTION OF
COMPUTER

4. Since man is born with
intelligence, he thought of ways
that would make things easy for
him. One of the problems
encountered by man was
counting the things he had.
Because of this, he invented
something that could help him

5. Early Computing
Devices
The Abacus
About 4,000 years ago, the Chinese
invented the ABACUS. It is an
adding tool that can help can you
add & subtract numbers by moving
beads back & forth on rods.

6. The Abacus

7. The Pascaline
Calculator
In 1642, Blaise Pascal, a French
mathematician, invented the Pascal
calculator. This device, also known
as the Pascaline. This device was
limited to addition & subtraction
only.

8. The Pascaline
Calculator

9. Leibnitz Calculator
In 1673, Gottfried Leibntiz, a German
mathematician & philosopher,
enchanced the Pascaline by
creating a device that could also
multiply. It can even find the
square root of number. The device
was called the Leibnitz Calculator/
machine.

10. Leibnitz Calculator/Machine

11. Difference Engine

12. Analytical Engine

13. Hollerith’s
Tabulating Machine
In 1889, Herman
Hollerith

14. mark i
1930

15. ENIAC 1943-1946

16. Today’s
Computers

17. Supercomputers
Supercomputers are the most
powerful computers made.
Supercomputers are used to
process huge amount of data
for complex processes such as
nuclear fission.

18. Supercomputers

19. Mainframe
ComCputers
Mainframe computers are the
largest among the computers
in use today. Mainframe
computers are used where
many people in large
organizations are frequently
accessing similar information.

20. Mainframe ComCputers