from the first to the present all types of computer are been described.....

1. evolution
of
Computer

2. 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
count fast and easy.

3. 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. The abacus was one of the
earliest counting devise invented to help
man solve his counting problems.
EARLY COMPUTING DEVICES

4. THE ABACUS

5. In 1642, Blaise Pascal, a French
mathematician, invented the Pascal
calculator. This device, also known as the
Pascaline, operated 8 movable dials, which
could add numbers up to 8 figures long. It
was used to perform simple arithmetic
calculations. This device was limited to
addition & subtraction only.
THE PASCALINE
CALCULATOR

6. THE PASCALINE CALCULATOR

7. 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.
LEIBNITZ
CALCULATOR

8. LEIBNITZ
CALCULATOR/MACHINE

9. In 1801, Joseph-Marie Jacquard, a
Frenchman, invented the
Jacquard’s loom. Jacquard’s loom
used punch card to program pattern
that were outputted as woven
fabrics by the loom.
JACQUARD’S
AUTOMATIC LOOM

10. JACQUARD’S AUTOMATIC LOOM

11. Difference Engine
In 1822, Charles Babbage, a British
mathematician professor, invented the
Difference Engine. Powered by steam &
as large as a locomotive, the machine
had the capacity to perform
calculations & print the results.
ELECTRO-MECHANICAL COMPUTING
DEVICES

12. DIFFERENCE ENGINE

13. In, 1833, several years after Babbage worked on
the Difference Engine, he began working on the
first general-purpose digital computer, which he
called the Analytical Engine. This steam-powered
engine outlined the basic elements of today’s
modern general-purpose computer and was a
breakthrough concept.
ANALYTICAL ENGINE

14. ANALYTICAL ENGINE

15. Electronic
Computing
Devices

16. In 1889, Herman Hollerith, an American
inventor, invented the Hollerith’s Tabulating
Machine . The machine was a punch card reader
& had the capacity to store & process data.
Hollerith brought his punch card reader into
the business world, founding the Tabulating
Machine Company which later became International
Business Machine (IBM) in 1924.
HOLLERITH’S
TABULATING
MACHINE

17. HOLLERITH’S TABULATING
MACHINE

18. This all-electronic calculator was
invented by Howard H. Aiken in
1930. This was used to create
ballistic charts for the U.S. Navy.
The Mark 1 is called the Harvard-
IBM Automatic Sequence Controlled
Calculator.
MARK 1

19. MARK I

20. Between 1943 and 1946, the ENIAC
or the Electronic Numerical Integrator and
Computer was developed by John Presper
Eckert and John Mauchly. This general
purpose computer computed at a
speed 1,000 times faster than the
Mark 1.
ENIAC

21. ENIAC

22. Today’s
Computers

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

24. SUPERCOMPUTERS

25. 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.
MAINFRAME
COMPUTERS

26. MAINFRAME
COMPUTERS