- History of MathematicsComprehensive history of mathematics. Incluldes links to other relevant websites.

- Mathematics Genealogy ProjectThe MGP attempts to compile information about all the mathematicians of the world.

- Martindale's Mathematics CenterLarge, online directory of mathematics resources.
- Catalog of Mathematics Resources on the WebCreated and maintained at Univ. of Wisconsin Colleges

- Access ScienceOnline version of McGraw-Hill Encyclopedia of Science and Technology, 10th ed. 2007 plus updates.
- Eric Weisstein's World of ScienceContains encyclopedias in the areas of chemistry, physics, astronomy and science biography. Also includes Wolfram MathWorld.
- PrimeFree, online mathematics encyclopedia.

- Oxford Dictionary of StatisticsAll aspects of statistics including terms used in computing, mathematics, operational research, and probability, as well as biographical information on over 200 key figures in the field.