Al-Khwarizmi
Al-Khwarizmi was known for the book he wrote about algebra, Compendious Book on Calculation by Completion and Balancing. He also wrote a book which taught the Western world about Hindu numerals and how to use them. This book was later titled the Hindu Art of Reckoning. With his books, al-Khwarizmi authored astronomical tables- tables designed to calculate the position of planets or eclipses.