| Samuel Neaman Institute: The Samuel Neaman Institute for Advanced Studies in Science and Technology is an independent public-policy research institute, established in 1978 to assist in the search for solutions to national problems in science and technology, education, economy and industry, and social development. |
| Sharif Think Tank: Iranian research and study institute. |
| Social Policy Research Associates: Commercial research organization. Web site contains reports on workforce and youth development, education, family support and diversity. |
| South Carolina Policy Council Education Foundation: A nonpartisan, tax-exempt public policy research and education foundation. Its mission is to educate members and all South Carolinians about state and local public policy based on the traditional South Carolina values of individual liberty and responsibility, free enterprise and limited government. |
| Sutherland Institute: A Utah-based public policy research organization supporting limited government, private property rights, and personal responsibility. |
| The Simple Society: A vision, both bold and broad of a simpler, more humane society that actually solves problems, treats everyone fairly and helps everyone achieve their full potential. |
Classical
