Mathematics  

A database of educational and documentary video including more than 150 computer science videos. Enables you to create and share playlists with others. Pacific users only.

Freely available electronic copy of the NIST Handbook of Mathematical Functions. Contains notation, properties, applications, and computation.

An extensive collection of over 67,000 integer sequences; each sequence entry includes the beginning of the sequence, its name or description, any references or links, any formulae, cross-references to other sequences, and the name of the person who submitted it.

Physics-Astronomy-Mathematics of SLA (Special Libraries Association)

Includes problems and puzzles, online mentoring, research, team problem solving, collaborations, and professional development.

An extensive site from Wolfram Research, makers of Mathematica

This organization focuses on collegiate mathematics

SIAM exists to ensure the strongest interactions between mathematics and other scientific and technological communities through membership activities, publication of journals and books, and conferences.