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| Encyclopedia Britannica | Online Version. |
| Internet Glossary of of Statistical Terms | Animated Software Company. Definitions, graphics, and links. |
| Internet Mathematics Resources | Langara College. Tutors, Tool, and Online Courses. |
| Internet Resources for the Mathematics Student | Alan Cooper, Langara College. Covers precalculus, calculus, differential equations. Over 1000 links arranged by broad subject. |
| The Mathematics Atlas | Dave Rasin, Northern Illinois University. Essays and explanations of mathematical topics, bibliographies, links. |
| On-line Encyclopedia of Integer Sequences | AT&T. detailed identification of integer sequences. Type in a series of numbers and the database will complete the sequence and provide the name of the sequence, along with its mathematical formula, examples of its classificatory structure, references, and links. |
| PRIME Mathematics Encyclopedia | B. SIdney Smith, University of Colorado, Boulder. 1000 entries, 24 extended articles, links. |
| Eric Weisstein's World of Mathematics. | Wolfram Research. Almost 12,000 entries and 6,000 figures. |