Abu Ja'far Muhammad ibn Musa al-Khwarizmi

lived from 780 to 850

**Al'Khwarizmi** was an Islamic mathematician who wrote on Hindu-Arabic numerals and was among the first to use zero as a place holder in positional base notation. The word *algorithm* derives from his name. His algebra treatise *Hisab al-jabr w'al-muqabala* gives us the word *algebra* and can be considered as the first book to be written on algebra.

*Find out more at*:

http://www-history.mcs.st-andrews.ac.uk/Biographies/Al-Khwarizmi.html