Summary

 Summary 

 ABACUS

Abacus

was

5000 years

the first calculating device, invented about

ago by the Chinese.

Napier Bones

In 2617, a scottish mathematician John Napier Invented

calculating device called Naplexo Bones. This device.

a set of rectangular rods marked witch numbers.

on them. It

meant for simple calculations

is

was

PASCALINE

In 1642, a

French mathematician named Blaise Pascal

invented the first mechanical comporting known as Pascaline

It consisted of a boy with movable, gears that could

add, subtract, multiply, and divide the numbers very easily

Leibnic's step Reckoner web

ny

In 1692, the more

Step Reckoner

advanced calculating machine named

lician Gottfried Withelms. It could perform all four

developed by a German mathema -lician Gottfried Withelms. It could perform all four

Hbasic mathematical operations,

Babbage's Analytical Engine

paitaus

a

In 1822

mathematics professor of Cambridge University,

famna

England, Charles Babbage developed a machine known

as Difference Engine. It could perform mathematical operations

1833, Babbage had better ideay and he stopped working

Difference

machine rene lugine and started designing mother

Analytical Engine.

a

on

Tabulating Machine

In 1890, Herman Hollerith, an

tabulating machine. This Tabulating enginer invented a

cesus

the USA. It

was used

gave a quick count of the US

population.

adol maintenisal

The First Electronic Computer

John Mauchly and John Prosper together buit the first

Successful electronic digital computer known ENIAC

In 1951, John Hauchly and John Presper developed another

Successful computer known as

Univac

15.

award

Personal Computer

14

10

198% IBM introduced its first Personal Computer and

1944, they introduced the advanced version of the

personal computers called PC-AT. these computres

were smaller in sice, faster in speed, more accurate,

and more reliable

Generations of Computer

First Generation Computers

The First Generation of Computers started in 1946

Features of first generation Computers

used Vacuum tube technology

They

They used Machine Lenguage

Second Generation

In the late 1950s, the Second Generation Computers.

were introduced,

They used Transistors.

They used Assembly Language

Thrib Generation

In the mid of 1960s, the development of Integrated Circult

was a major breakthrough resulthing in the introduction of

the Third Generation Computers.

They used integrated Circuits

The sice bearcame smaller

Fourth Generation

started

in 1971, and they used microprocesos

Which is

a

single chip that does all the

The size of computer became very small as

thousands of integrated Circuits

a single Chip

were built onto

They

use Microprocesor

They

are Multipurpose computers.

Firth Generation

based on Artificia!

The main goal of the fifth generation is to develop the

computers that con respond to natural language.

capable of learning and taking their own

Land'

are

decisions, for crample, Robot

They will have Artificial Intelligence

They are intended to work with naturd language