Al-Khwārizmī is famous for his mathematical works, which introduced Hindu-Arabic numerals and algebra to European mathematicians. In fact, the words algorithm and algebra come from his name and the title of one of his works, respectively.
Muḥammad ibn Mūsā al-Khwārizmī, or al-Khwarizmi and formerly Latinized as Algorithmi, was a Persian polymath who produced vastly influential works in mathematics, astronomy, and geography.