History of Mathematics, provided by David E. Joyce of Clark University's Department of Mathematics and Computer Science, contains some unique material including the Regional Mathematics, Chronology, and Timelines sections. Chronology and Timelines each provide timelines for mathematicians BCE and CE in both Western and non-Western civilizations. Regional Mathematics takes the same approach, but first the user chooses a part of the world which s/he is interested in. The site's strengths are its timelines, while its weakness is that the differences between these three core areas are not easily distinguishable.