This non-profit organization committed to the advancement of science in multiple disciplines. It publishes the journal Science.

This organization represents more than 80 profesional societies and organizations.

The oldest and largest professional organization in North America devoted to the scientific study of birds. Publishes the journal, The Auk. The site provides free access to the online Ornithological Newsletter.

The world's largest scientific society of individuals interested in microbiological sciences. The association represents 25 microbiology specializations.

A listing of over 13,000 environmental organizations. Searchable through multiple points. Entries are very brief including only a description of organizational purpose, phone number, address, and web site address, but the directory is comprehensive and provides a good starting point for those wishing to identify environmental groups.

NSF portal to granting and scientific study information, including program data and progress reports.