AlKhwārizmī is the first one to develop the concept of the algorithm in Mathematics. (jan 1, 800 – jan 1, 900)
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Algorism is the technique of performing arithmetic with Hindu-Arabic numerals. In my opinion, AlKhwārizmī is worthy the title of "grandfather of Computer Science", since he was the one who takes the first step.
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Zhang, Rui (Ella) - History of Computer Science
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