Algebra with Al Khwarizmi in the 8th century
The great mathematician Muhammad Al-Khwarizmi was born about 780 CE and became one of the first directors of the House of Wisdom in Baghdad, where he had the work of earlier mathematicians translated into Arabic.
An advocate of the Hindu number system, and advocated their use. Indeed, now known as the Hindu-Arabic numerals, they remain in worldwide use today. His name is remembered through the Arabic-derived words algebra, from one of his book titles, and algorithm, his Latinized name.