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  John Napier Video Napier works with the logarithms and publishes his book "A Description of the Wonderful Canon of Logarithms."
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  Henry Briggs Video Henry Briggs discusses base 10 logarithms and makes tables for sine, tangent, and secant.
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  Pascal_Fermat Video Pascal and Fermat develop the probablity theory.
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  Isaac Newton Video Newton develops the fundamental theorem of calculas.
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  L"Hopital Video L'Hopital developed to L'Hopital's rule to make finding the limit of indeterminant forms easier.