Computer History 9/4/13

Abacus

Jan 1, 1500

The abacus was used for counting skills.
image url=http://quest.eb.com/images/132/132_1306/132_1306091-W.jpg?rand=0.9466483962171999

Blaise Pascal

Sep 4, 1600

The computer that he created did not work well because of unreliable mechanical parts.
image url=http://quest.eb.com/images/115/115_8941/115_894151-W.jpg?rand=0.8102881248166593

Oughtreds and Schickards slide rule

Sep 6, 1621

The slide rule's basis is logarithms.
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Stepped Reckoner

Sep 5, 1791

It could add, subtract, multiply, and divide.
image url=http://upload.wikimedia.org/wikipedia/commons/thumb/b/b8/Leibniz_Stepped_Reckoner.png/640px-Leibniz_Stepped_Reckoner.png

Charles Babbage

Sep 5, 1791

He is father of computers. His computer had the same 4 basic parts that computers today have.
image url=http://quest.eb.com/images/115/115_2748/115_2748972-W.jpg?rand=0.22442061865263008

Jacquards Loom

Sep 5, 1804

Holes were punched to control the pattern in the cloth.
image url=http://quest.eb.com/images/115/115_8765/115_876596-W.jpg?rand=0.9247090653662576

Lady Augusta Ada Countess of Lovelace

Sep 5, 1815

She was the first computer programmer and a wonderful mathematician. Babbage is indebted to her for sorting his work.
image url=http://quest.eb.com/images/132/132_1227/132_1227322-W.jpg?rand=0.9349699719010534

Herman Hollerith's Electronic Tabulating Machine

Sep 5, 1850

It was used to calculate population. It used electronic instead of mechanical parts.
image url=http://quest.eb.com/images/300/300_1832/300_1832932-W.jpg?rand=0.6557062095444431

Alan Turing

Sep 6, 1936

He published a paper on computable numbers in the year of 1936.
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The Atanasoff-Berry Computer (ABC)

Sep 5, 1937

It was the first computer. Atanasoff came up with it when he orderded bourbon from a bar.
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Harvard's Mark I

Sep 5, 1944

It was a huge giant calculator. It weighed 35 tons and had 500 miles.
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Dr.Grace Murray Hopper

Sep 5, 1944

She fixed the first computer bug(which was a actual bug).
image url=http://quest.eb.com/images/132/132_1223/132_1223332-W.jpg?rand=0.380905933145541

ENIAC

Sep 5, 1946

It is the Electronic Numerical Integrator and Computer. It was programmed by people, not by floppy disk that was used for the other computers at that time.
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Bill Gates

Oct 28, 1955

He created the Internet. image url=http://quest.eb.com/images/115/115_2747/115_2747675-W.jpg?rand=0.461990381225443

vacuum tubes 1rst generation of computers

Sep 5, 1958

Vacuum tubes developed in 1951-1958 image url=http://quest.eb.com/images/139/139_1897/139_1897181-W.jpg?rand=0.6583177755813581

Transistors (2nd generation of computers)

Sep 5, 1959

Transistors were used from 1959-1964. They were smaller, faster, could hold a larger amount of information, reliable, and cheaper than vacuum tubes. image url=http://quest.eb.com/images/118/118_8195/118_819527-W.jpg?rand=0.8102977863244957

Integrated circuit (3rd generation of computers)

Sep 6, 1965

The integrated circuits lasted from 1965-1970. They were smaller, cheaper, and more reliable.
image url=http://quest.eb.com/images/139/139_1907/139_1907810-W.jpg?rand=0.1840622490925823

Microprocessor (4th generation of computers)

Sep 6, 1970

The microprocessors were used in the early 1970's. They were smaller, faster, and more reliable.
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