A very old site on the Reciprocal System, is being deprecated and its contents have been merged into The old links from search engines should continue to work over the next year, pointing to the corresponding pages on this site. Many thanks to Jan Sammer for keeping that site going for all these years. is the official site for information Dewey B. Larson and the Reciprocal System of physical theory, as authorized by the International Society of Unified Science (now doing business as the Reciprocal System Research Center).

Development and improvements to presentation, style and theme are under way. If you have suggestions or additional content for the site, please make a post to the "Website General Information" category of the Reciprocal System forum, or use the contact page here.

International Society of  Unified Science
Reciprocal System Research Society

Salt Lake City, UT 84106

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