Search the Mathematics Subject Classification database.

Browse or search mathematics research instutions and universities.

From Dave Rusin and includes "A Gentle Introduction to the Mathematics Subject Classification Scheme".

The Virtual Library of Mathematics.

Directions to set up an ArXive RSS feed in a snap.

This job site is sponsered in part by the American Mathematical Society.

From Eric Weisstein, this searchable "considered not only the clearest and most readable online resource for mathematics, but also one of the most reliable."

Join a listserv to hear the lastest discussions in the math community. Meet colleagues and ask questions.

Search for the latest math papers and preprints.

From the University of Plymouth, a collection of mathematics lessons ranging from algebra to calculus to proofs.

"Inspired by Whitehead and Russell's monumental Principia Mathematica, the Metamath Proof Explorer has over 8,000 completely worked out proofs, starting from the very foundation that mathematics is built on and eventually arriving at familiar mathematical facts and beyond."

Your gateway to all things math.

List of Penn math e-resources including databases, journals, etc.

The Physics/Astronomy section of the MPA Library website.

Terri Vogel's Bloglines feed

Scopus

From the Centers for Disease Control and Prevention (CDC) provides quick access to statistics on topics of public health importance and is organized alphabetically. Links are provided to publications that include the statistics presented, to sources of more data, and to related web pages.

USE OF ICPSR DATA REQUIRES STATISTICAL PROCESSING SOFTWARE AND GZIP DECOMPRESSION SOFTWARE. Direct-download access to social science quantitative data sets archived by ICPSR. Subjects covered include political science, sociology, demography, history, economics, communication, international relations, gerontology, public health, criminal justice, and education.

Databases on toxicology, hazardous chemicals, environmental health, and toxic releases

From the National Science Foundation, provides a broad base of quantitative information about U.S. science, engineering, and technology

Scientific research data from the Department of Energy