| Abbreviation | Definition |
|---|---|
| SCMM | Southern California Medical Museum |
| SCRM | South Carolina Railroad Museum |
| SCRU | Submerged Cultural Resources Unit, National Park Service |
| SCSTM | Sichuan Science and Technology Museum (China) |
| SDHM | San Dieguito Heritage Museum |
| SDMA | San Diego Museum of Art |
| SDMM | San Diego Maritime Museum |
| SDRM | San Diego Railroad Museum |
| SFM | Science Fiction Museum |
| SFMF | Security Forces Museum Foundation |
| SFMOMA | San Francisco Museum of Modern Art |
| SFMOMA | San Francisco Museum of Modern Art's |
| SFPALM | San Francisco Performing Arts Library & Museum |
| SFRM | South Florida Railway Museum |
| SFTM | Shelburne Falls Trolley Museum |
| SI | Smithsonian Institute |
| SIMM | Seattle Interactive Media Museum |
| SIMT | Sheffield Industrial Museums Trust |
| SJAM | Social Justice Alliance of Museums |
| SJM | St. Joseph Museum, Inc. |