The Free On-line Dictionary of Computing (30 December 2018):

Muhammad ibn Musa al-Khwarizmi
al-Khwarizmi
Khwarizmi
Mohammed Al-Khawarizmi
Muhammad al-Khwarizmi

    An astronomer, geographer and mathematician, born around
   780 CE in Khwarizm (modern Khiva), south of the Aral Sea.
   Khawarizmi founded algebra and algorithms (named after him),
   synthesised Greek and Hindu knowledge, introducing the Indian
   system of numerals (now known as Arabic numerals), developed
   operations on fractions, trigonometric tables containing the
   sine functions, the calculus of two errors and the decimal
   system, explained the use of zero, perfected the geometric
   representation of conic sections, collaborated in the degree
   measurements aimed at measuring of volume and circumference of the
   Earth and produced the first map of the known world in 830 CE.  He
   died around 850 CE.

   Muslim Heritage.com

(http://muslimheritage.com/day_life/default.cfm?ArticleID=317&Oldpage=1]).

   (2008-07-08)