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200 BC First device known to carry out calculations
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Invented by french dude, calculated sums.
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Gottfried von leibniz invents a device that adds, subtracts, divides, multiplies.
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French weaver finds that using punch cards he could 'program' his weaver
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English mathematician invents 2 calculating machines - Difference Engine
Analytical Engine -
Used to calculate census data.
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Punch cards fed into machine
52 feet long
50 tons
750,000 parts -
Built at univ of penn 18,000 vacuum tubes
30 tons -
built and sold to the US census bureau
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faster, smaller, more reliable, more energy efficiant computers
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CPU on a chip was invented
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Built in a garage.
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Faster and more affordable
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"personal computer" invented.
