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Ada lovelace is the first computer programmer
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Punch cards are first used in stores
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Charles Babbage first describe analytical machine
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IBM is founded
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They started to use vacuum tubes to keep the memory
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They use transistors (upgrade version of vacuum tubes) because its more cheaper, smaller and easy to use.
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They change and use Integrated circuits(computer chip)
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Now we use microprocessor (silicon chip that contains CPU).
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In December 3 1987, the first transistor is created
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World wide web start its buisness.