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the history of computers
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pascaline
With the Pascaline, you were able to subtract and add. Blaise Pascal had originally made it to help his dad with his taxes, but once someone else had seen it, it became wildly popular. www.visionfutur.com -
Stepped Reckoner
Like the Pascaline, it coulld add and subtract, but can also divide and multiply! It was made by Gottfried Wilhelm. He made a couple of failed attempts at it, but it didnt work until some one else took over and shifted the form of it. http://commons.wikimedia.org/wiki/File:Pascalina.jpg -
charles babbage
He was known as the father of computers. His difference engine was never officialy finished. Their is footage of this marvelous machine at work. -
Jacquard Loom's punched cards
His idea provided a model for the input and output data of an electronic/mechanical mix. These cards, made out of cloth, helped count the U.S census. -
Herman Hollerith and the Electronic Tabulating Machine
This was used to calculate the United States census. He was the first American man associated with computers. He made it considering that the immigration rate was high at the time. They would not have been able to count it all in ten years without a machine. -
Abacus
It was made in 3000 B.C. It was not a peice of machinery. it was this wooden square with rods inside of it that had beads on them. Basically, you could add and subtract with it. http://www.flickr.com/photos/aussiegall/411182765/ -
vaccuum tubes
They were used as switches. It used electrons, or electricity. -
abc
It was the first computer. It could not save files or programs. -
Harvard's mark 1
Howard invented a large calculator. This calculator had mechanical relays, or switches. -
ENIAC
It was known as the first computer for a long time. Recently, they found out that the ABC was the first one. -
Transistor
Transitors perform the same function as a vaccum tube but do not get as hot as fast due to having a fan. It is much smaller, more reliable, and faster. -
integrated circuits
It reduced the size and cost. It also upgraded the speed and reliability of computers. -
Microprocessor
This chip brought the fourth generation of computers. They made computers a lot faster and are still doing this today. It controls the four basic parts of a computer.
