| Abbreviation | Definition |
|---|---|
| SCAU | Student Consumer Action Union |
| SCCU | Sisters' Camelot Canvass Union |
| SCCU | South Central Credit Union |
| SCCU | Southern Cross Credit Union |
| SCCU | Space Coast Credit Union |
| SCCU | Spokane City Credit Union |
| SCCU | Star Choice Credit Union |
| SCCU | State Chartered Credit Union |
| SCCU | Superior Choice Credit Union |
| SCFL | South Central Federation of Labor |
| SCLU | Santa Cruz Longboard Union |
| SCMU | Scottish Commercial Motormen's Union |
| SCPTH | Syndicat des Constructeurs de Petites Turbines Hydrauliques (French: Small Hydraulic Turbine Manufacturers Union) |
| SCRMU | South Central Railway Mazdoor Union |
| SCRU | Sunshine Coast Rugby Union |
| SCRUM | Scottish Club Rugby Union Magazine |
| SCSU | Scarborough Campus Students' Union |
| SCSU | Sheffield College Student Union |
| SCTU | Singapore Chinese Teachers Union |
| SCTU | Sligo Council Of Trade Unions |