International Organizations and Groups | Aim - Objective |
| Partnership for Peace (PFP) | to expand and intensify political and military cooperation throughout Europe, increase stability, diminish threats to peace, and build relationships by promoting the spirit of practical cooperation and commitment to democratic principles that underpin NATO; program under the auspices of NATO |
| Permanent Court of Arbitration (PCA) | to facilitate the settlement of international disputes |
| Rio Group (RG) | to consult on regional Latin American issues |
| Schengen Convention | |
| Second World | Second World |
| Shanghai Cooperation Organization (SCO) | to combat terrorism, extremism, and separatism; to safeguard regional security through mutual trust, disarmament, and cooperative security; and to increase cooperation in political, trade, economic, scientific and technological, cultural, and educational fields |
| socialist countries | socialist countries |
| South | South |
| South American Community of Nations (CSN) | to coordinate common policies regarding multilateral organizations, to integrate physical infrastructure, and to consolidate the merger of CAN and Mercosur |
| South Asia Co-operative Environment Program (SACEP) | to promote regional cooperation in South Asia in the field of environment, both natural and human, and on issues of economic and social development; to support conservation and management of natural resources of the region |
| South Asian Association for Regional Cooperation (SAARC) | to promote economic, social, and cultural cooperation |
| South Pacific Forum (SPF) | South Pacific Forum (SPF) |
| South Pacific Regional Trade and Economic Cooperation Agreement (Sparteca) | to redress unequal trade relationships of Australia and New Zealand with small island economies in the Pacific region |
| Southeast European Cooperative Initiative (SECI) | to encourage cooperation among participating states and to facilitate their integration into European structures |
| Southern African Customs Union (SACU) | to promote free trade and cooperation in customs matters |
| Southern African Development Community (SADC) | to promote regional economic development and integration |
| Southern Cone Common Market (Mercosur) or Southern Common Market | to increase regional economic cooperation |
| Third World | Third World |
| underdeveloped countries | underdeveloped countries |