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John Napier discovered logarithms. Logarithms is a long sum in mathematics.
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Blaze Pascal invented the first calculator in 1645 but it only did adding and subtracting – not a complicated calculator.
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Gottfried Wilhelm von Leibnitz – more complicated calculator – 1674
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Joseph-Marie jacquard invented a loom which makes cloths this was invented in 1804.
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Lady Augusta ada – first programmer, programed bragges invention
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Charles Babbage – difference engine, analytical engine and also train things – 19th century
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Tommy flowers and Alan Turing – invented first electronic computer
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Alan turing – paper called on computable numbers – 1942
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Bletchley Park – code breakers used computers