| | History of science and technology (Site not responding. Last check: 2007-10-01) |
 | | A popular Islamic scholar, Muhammad ibn Musa al-Khwarizmi gave his name to what we now call an algorithm, and the word algebra is derived from al-jabr, the beginning of the name of one of his publications in which he developed a system of solving quadratic equations. |
| | This civilization did not smelt metals or use the wheel; they possessed a system of writing and amazing fluency with flint-knapping including portraiture in flint. |
| | Their calendar utilized a base-20 number system with zero, and an understanding of astronomy sufficiently accurate to support an accurate calendar, 1000 years ahead of any in Europe, as of 650. |
| www.choam.info /title/hi/history-of-science-and-technology.html (1382 words) |
