| SIOC | Saga Iswara Owners Club 
| Others |
| SIOC | Security Information and Operations Centre
| Others |
| SIOC | Security Information Operations Centre
| Others |
| SIOC | Semantic Interlinked Online Communities
| Others |
| SIOC | Semantically Interlinked Online Communities
| Others |
| SIOC | Semantically-Interlinked Online Communities
| Others |
| SIOC | Serial Input Output Controller
| Others |
| SIOC | Shanghai Institute of Organci Chemistry
| Others |
| SIOC | Shanghai Institute Of Organic Chemistry
| Others |
| SIOC | Ship in Original Carton
| Others |
| SIOC | Siocstrategic Information Operations Center
| Others |
| SIOC | Societal Impact Operating Council
| Others |
| SIOC | South Island Organ Co Ltd
| Others |
| SIOC | State Information Officers Council
| Others |
| SIOC | Storage I O Control
| Others |
| SIOC | Storage I/O Control
| Others |
| SIOC | Strategic Information And Operations Center
| Others |
| SIOC | Student Initiated Outreach Center
| Others |
| SIOC | Subaru Impreza Owner's Club
| Others |