Polymath Systems

The reference sources listed on this page have in common that they provide useful information and do not charge a fee. I have removed some listings that no longer qualify under those standards. Please notify me if there are any problems with these links.


Computer Resources

Dictionaries and Language

General Reference Sources

General Science Resources
See also Space Science Links


Math Resources

Medical Reference Sources

News Organizations

Search Engines

Telephone/Address/E-mail Directories




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