0 - Zero

The Digit Zero
Some information about the number zero and links to other pages.
http://www-personal.umich.edu/~danhorn/digits/zero.html

Zero
A history of Zero that describes the introduction of zero and the main persons that brought advantages to it.
http://www-groups.dcs.st-and.ac.uk/history/HistTopics/Zero.html

Zero in Four Dimensions
A paper discussing the historical, psychological, cultural, and logical perspectives of the number zero.
http://www.pantaneto.co.uk/issue5/arsham.htm