HISTO

RY OF

COMPUTE

RS

AH

SA

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4F

SINCE THE EARLISET TIMES PEOPLE USED THEIRFINGERS TO SHOW HOW MANY

THUS THEY COULD TELL THE NUMBER OF ANMALS

ON HUNT. THEY COULD SHOW THE NUMBER OF PEOPLE

THE ABACUS

The abacus was the first calculating machine

It was developed by the Chinese about 5000

Years ago

NAPIER'S BONE

IN 1617, JOHN NAPIER,S MATAHMATICAN FROM

SCOTALAND, INVENTED CALULATINGRODS CALLED

NAPIER,S BONE

PASCAL,S ARTIHMETIC MACHIN

SOME YEARS LATER IN 1642, a youg freanch

Mathamatican named pacals

INSIDE VIEW PACAL,S MACHINE

When a wheel made a complete turn from 1 to 9 ,a small cut

Causd the next to left to move up 1 number

BABAGE ENGINE

The first calculating machine that can be truly

Called acomputer was invented in ing land by

Chares babage in 1835