| Abbreviation | Definition |
|---|---|
| SCIS | Smart Cities Information System |
| SCLOC | Space Coast League of Cities |
| SCN | Strong Cities Network |
| SCNZ | Sister Cities New Zealand |
| SCRD | Smart Cities and Regional Development |
| SCRI | Smart Cities Research Institute |
| SCSP | Smart Cities Symposium Prague |
| SCUFCP | Steering Control of the Urban Flood Control Program |
| SD | San Diego, California |
| SDCN | Sustainable Digital Cities Network |
| SFC | Sucka Free City |
| SFE | Santa Fe |
| SJM | São João da Madeira |
| SKAC | Sharing Knowledge Across Cities |
| SKC | Sporting Kansas City |
| SLO | San Luis Obispo |
| SMFC | San Mateo Foster City |
| SoBe | South Beach |
| SOTC | State of the City |
| SR | San Rafael, California |