Web Directory

» Abacus: Mystery of the Bead
   History of the abacus and an instruction manual on its use.
   http://webhome.idirect.com/~totton/abacus/

» Digital Library of Mathematical Functions
   This mockup gives an idea of the current ideas about the design and organization of the new Digital Library; these ideas are, of course, subject to change. Content only is only available in a few places.
   http://dlmf.nist.gov/

» EquationSheet.com
   Searchable directory, arranged by field, of equations, constants, symbols and SI units. Also features LaTEX utilities, software links.
   http://www.equationsheet.com/

» Geometry Formulas and Facts
   An excerpt from the 30th Edition of the CRC Standard Mathematical Tables and Formulas, covering the area of Geometry (minus differential geometry), by Silvio Levy.
   http://geom.math.uiuc.edu/docs/reference/CRC-formulas/

» Glossary of Math Terms
   Explains commonly used words specialized to this field. Includes examples and some graph illustrations.
   http://www.dpi.state.wi.us/dpi/standards/mathglos.html

» Math Assistance
   Lists rules and formulas for a number of mathematical subjects, such as plotting graphics, functions, factoring, derivatives, integrals, matrices, vectors, and numerical analysis. In English, French and Turkish languages.
   http://www.ercangurvit.com/

» Math2.Org
   Formerly Dave's Math Tables. Mathematical tables on-line and downloadable.
   http://math2.org/

» Mathematical Atlas
   A topical guide to modern mathematics that explains the subdisciplines. Includes graphics that represent their relative size and relationship.
   http://www.math.niu.edu/~rusin/known-math/welcome.html

» Mathematics Notes
   Exposition of the basic concepts and theory of various subjects including matrix theory, calculus, modern abstract algebra, linear algebra, plane analytic geometry and solid analytic geometry.
   http://pages.prodigy.net/jmiller.cb/math.html

» Mathematics Resources
   Offers a large number of links to mathematical resources, dedicated to various topics.
   http://www.educationindex.com/math/

» Numerical Prefixes
   Tables for Greek and Latin number values alone and as a part of other words.
   http://phrontistery.info/numbers.html

» On-Line Encyclopedia of Integer Sequences
   Identify a sequence by entering few terms in the sequence. Additional information includes examples, formulas, and related links.
   http://www.research.att.com/~njas/sequences/

» PlanetMath
   A collaborative encyclopaedia with entries contributed under the GNU Free Documentation License.
   http://planetmath.org/

» Platonic Realms
   Online resource for the mathematics community: links library, bookstore, quotes, and online articles.
   http://www.mathacademy.com/pr/index.asp

» Sin and Cos in Surds
   Sin and Cos expressed in square roots, simplified with rationalised denominators.
   http://www.jdawiseman.com/papers/easymath/surds_sin_cos.html

» Summation Formulae
   For polynomials of degrees up to 50, generated using the Euler-Maclaurin method.
   http://polysum.tripod.com/

» The Math Reference Project
   An electronic archive of articles by Karl Dahlke on topics ranging from high school geometry up to graduate level topology.
   http://www.mathreference.com/

» Wikipedia: Mathematics Section
   Free encyclopedia. Covers number systems, different math fields, foundations, history, applications, and famous problems.
   http://en.wikipedia.org/wiki/Mathematics

» Wolfram: Mathematical Functions
   Includes advanced formulas and visualizations of various equation, such as elliptical curves.
   http://functions.wolfram.com/