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Blaise Pascal invented the first machine that could do really small calculations.
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Charles Babbage, he gave a conferency on which he gave the begginings of the actual computer calculations.
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Alex Turing, he invented the machine that could solve any problem that was introduced by algorythms
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Howard Aiken, created a machine that was used during the WW2 for army uses.
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Jack Kilby, invented the first integrated system with empty tubes for the usage of the actual softwares.
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Bill Gates, since Microsoft creation he developed the first actual softwares.