| Society for Initiatives in Nutrition and Development (SIND) |
| Society for Peoples participation in Ecosystems Management(SOPECOM) |
| Society for the Development of Women and Children |
| Society of Neuro-Vascular Intervention |
| Software Development |
| Sohrevardi Private High Educational Institute |
| Soil Survey and Land Use Organization |
| Solid State Physics Laboratory |
| Sona College of Engineering |
| Sona College of Technology |
| Sonamukhi College |
| Sonatrach Laboratoire de Corrosion |
| Soni Nursing College |
| Sonic Biochem Extraction Ltd |
| Sophia College |
| Sophia College for Women |
| Sou. Venutai Chavan Polytechnic |
| South Asian Nitrogen Centre and Indian Nitrogen Group |
| South Asian University |
| South Central Railway |
| South East Asian College of Management Studies |
| South Indians' Welfare Society College |
| South Travancore Hindu College |
| South Valley University |
| Southern Illinois University, Carbondale, School of Medicine |