SMCC
- Saint Mary's College of California
- Santa Monica College
- Science Media Centre of Canada
- Seattle Metropolitan Chamber of Commerce
- Sierra Madre Congregational Church
- Social Media
- South Mountain Community College
- Southern Maine Community College
- Southwest Mississippi Community College
- St Mary's Cathedral College, Sydney
- St. Mary's Canossian College
- Submarine Command Course
- Succinimidyl 4-(N-maleimidomethyl)cyclohexane-1-carboxylate
- Sun Microsystems
- Syro Malabar Catholic Congress
- Syro-Malabar Catholic Church
- Syro-Malankara Catholic Church