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History of Computers by Mind Map: History of Computers
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History of Computers

All Digital Computers


The Abacus

Used for mathematical calculations

Could do addition and subtraction

People mistaken the Chinese for being the first to use it when it was really the Babylonians

The modern ones have rods where the pebbles can slide back and forth, while the older ones don't have the rods

The Logarithm

1617 created by John Napier

Could be used to do mulitiplication

Led to the "Slide Rule"

Calculating Clock

Invented by Wilhem Schickard in 1623

First gear driven calculating machine

Didn't get a lot of publicity because Wilhem died right after he created it

The Pascaline

1642 created by Blaise Pascal, at age 19

Created it to help his father who was a tax collector

Could only add

Stepped Reckoner

Created by Gottfried Wilhelm Leibniz

It could add, subtract, divide, and multiply

He was the first one to use the binary system

He died poor

Punched Cards

1801 Joseph Marie Jacquard invented a power loom

Had your name, adress, phone number etc on it

Your gas bill would come with a punch card

Had your name, adress, etc

Difference Machine

Created by 1822 Charles Babbage

Machine was the size of a room

Had government funding, which costed a lot of money

Was never finished because of money issues

Analytic Engine

Hollerith Desk

Had a card reader

Sensed the holes in the cards

Gear driven mechanism

Large wall of dial indicators shows the count

Census machine was the first machine ever to be on a magazine cover

Mark 1 Computer

Partnership between havard and IBM in 1944

First digital computer created in the US

Ran non stop for 15 years


Could only store 72 numbers

Calculated digits that were 23 digits long

Grace Hopper

1953 she created the first high level language "flow matic"


Apple 1

Steve Wozniack created the Apple I

Could be plugged into your tv

Had a keyboard

They were sold for about $500 each

J.V Atanasoff

Built a digital computer

No gears, belts, shafts etc

Bill Gates

Went to Harvard and as a freshman he dropped out

Dropped out because he wanted to create and design new programs for his computer