ICT LESSON FOR PRIMARY TWO PUPILS

1. HISTORY
OF
COMPUTER
BY E . I I S R A E L

2. HISTORY OF COMPUTER
•History of computer means how
computer came into being. Long
ago, people counted with stones,
pebbles, fingers, sticks, or marks on
the walls.

3. EARLY COUNTING DEVICE
Fingers Stones

4. EARLY COUNTING DEVICE
Pebbles
foot
Sticks
Bones

5. HISTORY OF COMPUTER
•These ways are not convenient for
counting large numbers. Hence
people looked for easier and
quicker ways. This led to the
discovery of a device called Abacus.

6. ABACUS
Abacus was the
first mathematical
device used for
calculations. It
was invented
5,000 years ago
by the Chinese.

7. HISTORY OF COMPUTER
• It consist of strings, beads and
wooden handle. It is used to add,
subtract and multiply large numbers.
• The second counting device is called
Napier’s bone.it was invented by John
Napier and it is better than Abacus.

8. NAPIERS BONE/ROD

9. HISTORY OF COMPUTER
• Later in 1642,
Pascal invented the
first mechanical
calculator called
Pascal’s Adder.
•

10. ANALYTICAL
ENGINE
Analytical engine:
the Analytical
engine was
designed by
Charles Babbage. It
has the same
element as the
modern computer.

11. WHO IS CHARLES BABBAGE?
•Charles babbage
is the father of
modern
computer.