| Abbreviation | Definition |
|---|---|
| SCSA | Society of St. Andrew |
| SCSC | Safety-Critical Systems Club |
| SCSC | Somali Community Support Centre |
| SCSF | SSA (Social Security Administration) Community Scholarship Fund |
| SCSFI | SSA ( Social Security Administration) Community Scholarship Fund, Inc. |
| SCSFI | SSA (Social Security Administration) Community Scholarship Fund, Incorporated |
| SCSG | Sitka Collaborative Stewardship Group |
| SCT | Society for Clinical Trials |
| SCTFYC | Schuylkill County Tobacco- Free Youth Coalition |
| SCUR | Society for Cutaneous Ultrastructure Research |
| SCVHS | Santa Clarita Valley Historical Society |
| SCVI | Sons of Confederate Veterans, Inc. |
| SCVI | Sons of Confederate Veterans, Incorporated |
| SCW | Support Center of Washington |
| SD100ID | Sons and Daughters of the 100th Infantry Division |
| SDA | Service Dogs for America |
| SDC | Syrian Documentation Center |
| SDCA | Sandwell Deaf Community Association |
| SDCC | San Deigo Comic Con |
| SDCCFC | San Diego County Combined Federal Campaign |