| The Abacus | Luis Fernandes. Information on the construction, history, and use of the abacus, as well as comparisons of abacuses from different cultures. Users can play with an interactive abacus. |
| Calculators | Martinsdale. Algebra, chaos, histograms, fractals, vectors, etc. |
| Calculus Tutor | Explanations and and problems concerning limits, continuity, derivatives, exponentials, etc. Online help available. Links to other relevant pages. |
| Calculus on the Web | Temple University. A math site that lets a person work through all types of math problems |
| Chaos | University of Maryland. Research reports chaotic dynamics ranging from the theory of dimensions, fractal basin boundaries, chaotic scattering, controlling chaos, etc. |
| The Geometry Center | University of Minnesota. Site includes hypertext papers, geometry images and formulas, downloadable software, video production information, course materials, information about distance learning, etc. |
| Historical Math Book Collection | Cornell University. Full text of 571 older mathematics "classics". |
| History of Mathematics Archive | MacTutor. Bibliography of >700 books, articles, and internet sites arranged by subject, geographical region, and chronology. Famous curves index, biographies of more than 1,100 mathematicians. |
| Math Archives | University of Tennessee Knoxville. Searchable links to math sites including software, teaching materials, links. |
| Math2.org | Dave Manura. A range of math tables, covering general math, algebra, geometry, trigonometry, vectors, statistics, calculus, Fourier series, etc. Also a discussion group and links to relevant sites. |
| Mathematics Web Sites of the World | Pennsylvania State University. Exhaustive collection of links to math departments, institutes, publishers, software , journals, etc. |
| Mathworld | Eric Weisstein. Comprehensive and interactive mathematics encyclopedia. |
| Metamath Proof Explorer | 5,000 formal proofs, definitions and axioms in logic and set theory. |
| Multi-repository Mathematics Collections | Michigan State University. Search works of thousands of texts and articles of leading mathematicians. |
| Number Theory Web | Keith Matthews, University of Queensland. Links to downloadable number theory routines, these, journals, lecture notes, news jobs, etc. |
| SOS MATHematics | Mathemedics. Explanations, formulas, tables, tests, etc. concerning algebra, trigonometry, calculus, differential equations, complex variables, matrix algebra. |
| StatLib | Carnegie Mellon University. System for distributing statistical software, datasets, and information. |