| Abbreviation | Definition |
|---|---|
| SIAM | Society of Indian Automobile Manufactures |
| SIAPEC | Italian Society of Pathological Anatomy and Diagnostic Cytology |
| SIAPEC | Societ Italiana di Anatomia Patologica e Citologia Diagnostica |
| SIAPEC | Società Italiana di Anatomia Patologica e Citologia Diagnostica |
| SIARB | Bolivian Rock Art Research Society |
| SIARB | Sociedad de Investigacin del Arte Rupestre de Bolivia |
| SIARB | Sociedad de Investigación del Arte Rupestre de Bolivia |
| SIAS | Society for International Affairs at Stanford |
| SIAS | Staple Inn Actuarial Society |
| SIATI | Society of Indian Aerospace Technologies and Industries |
| SIATI | Society of Indian Aerospace Technologies Industries |
| SIB | Italian Society of Biochemistry and Molecular Biology |
| SIB | Sociedad de Ingenieros de Bolivia |
| SIB | Societ Italiana di Biochimica e Biologia Molecolare |
| SIB | Società Italiana di Biochimica e Biologia Molecolare |
| SIB | Society of Engineers of Bolivia |
| SIBA | Society of Independent Brewers And |
| SIBI | International Society of Bioethics |
| SIBI | Sociedad Internacional de Bioética |
| SIBI | Sociedad Internacional de Biotica |