HISTORY OF COMPUTERS

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SCARSDALE INTERNATIONAL SCHOOL

History of Computers4-Z

COUNTING IN THE PAST

Long ago there were problems with calculating

so people had to count by their fingers but then

they thought about calculating by stones and

pebbles.

ABACUS

The abacus was the first device to calculate it was

a mechanical device. About 5000 years ago it was

made by a Chinese.

NAPIER'S BONE

It was called Napier's bone it was used to multiply

big or any kind o f numbers it was built by

mathematician John Napier.

PASCALINE

It was called pascaline it looked like a shoe box but

from inside it looked like a piano a man named

Blaise Pascal. It was made for computing.

ANALYTICAL MACHINE

The analytical machine was a machine that could

tell the answer of the big calculations a man named

Charles Babbage built it in 1835.

TABULATING MACHINE

The tabulating machine was built so people could

find out the population of their country a man named

Herman Hollerith built it

By: Hassan Irfan And

Abdullah Amir