The Reciprocal System Research Society

The International Society of Unified Science is switching to a new name, the Reciprocal System Research Society (RSRS or RS2).

The primary reason for doing this was that "ISUS" is just too close to another popular group that's in the news almost daily, "ISIS." Secondary reasons are to give better search engine response with the "Reciprocal System" now being part of the business name.

This site ( and the RS2 site ( are being deprecated in favor of better names: - is the current archive of all the material relating to Larson's original research since 1959, along with other contributors. will be the official research site of the society, moving forward along the RS2 lines that were established on

Please bear with us as we make the conversion. Thank you for your patience.