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History of Computers PowerPoint PPT Presentation


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History of Computers. Created by Mrs. Gile Based on information taken from Computers Made Friendly. 1642. 19 year old Frenchman named Blaise Pascal invents a machine that can add and subtract. He called the machinge the Pascaline. . 1673.

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History of Computers

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History of Computers

Created by Mrs. Gile

Based on information taken from Computers Made Friendly


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1642

19 year old Frenchman named Blaise Pascal invents a machine that can add and subtract. He called the machinge the Pascaline.


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1673

  • A German by the name of Gottfried Leibniz invents the Leibniz Calculator. This machine could add, subtract, multiply and divide.


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1823

  • An Englishman; Charles Babbage designed the Difference Engine and the Analytical Engine. Because of his contributions, Babbage is known as the Father of Computers.


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1890

  • Herman Hollerith became the first American to contribute to the invention of comptuers. He invented the Tabulating Machine. He began a company called International Business Machines.


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1940

  • Vacuum Tubes controlled the flow of electricity in a computer. They got very hot and would burn out. When this happened, the computer stopped working.


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1950

  • Transistors replaced vacuum tubes. Transistors were much smaller, and were more reliable than vacuum tubes.


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1960

  • The first integrated circuit was designed. It combines all the electronic parts a computer needs to run in one small place – a chip. It is about the size of your fingernail.


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1974

  • A microprocessor contains not only electronic circuits but also memory storage for a computer. Today microprocessors are small enough to fit into machines that fit in the palm of your hand.


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