| Abbreviation | Definition |
|---|---|
| SIL | Sähköinsinööriliitto |
| SIL | Shkinsinriliitto |
| SILA | Society of Illustrators of Los Angeles |
| SILAS | Society for Irish Latin American Studies |
| SILF | Society of Indian Law Firms |
| SILS | Society of International Law Singapore |
| SIM | International Musicological Society |
| SIM | Internationale Gesellschaft fr Musikwissenschaft |
| SIM | Internationale Gesellschaft für Musikwissenschaft |
| SIM | Sociedad Internacional de Musicologia |
| SIM | Societ Internazionale di Musicologia |
| SIM | Società Internazionale di Musicologia |
| SIM | Société Internationale de Musicologie |
| SIM | Society for the Internet in Medicine |
| SIM | Socit Internationale de Musicologie |
| SIMD | Society for Inherited Metabolic Disorders |
| SIMI | Italian Society of Internal Medicine |
| SIMI | Societ Italiana di Medicina Interna |
| SIMI | Società Italiana di Medicina Interna |
| SIMI | Society of Irish Motor Industry |