The ICPSR Thesaurus is a controlled vocabulary system. Development of the ICPSR Thesaurus was supported by the National Science Foundation (SES-9977984). The scope of this thesaurus is multidisciplinary and is intended to reflect the subject range of the ICPSR archive. Social science disciplines represented include: political science, sociology, history, economics, education, criminal justice, gerontology, demography, public health, law, and international relations.