| Abbreviation | Definition |
|---|---|
| SIL | SIL Is Listed |
| SILA | Shuswap Independent Living Association |
| SIMEC | Shipping, Infrastructure, Mining, Energy and Commodities |
| SIMIC | Severely Indebted Middle Income Country |
| SINET | Sok Im Net (Internet Service Provider) |
| SION | Security Innovations Operations And Networks |
| SIPC | Security Industry Protection Corporation |
| SIPC | Security Investors Protection Corporation |
| SIPCOT | State Industries Promotion Corporation of Tamil |
| SIPCOT | State Industries Promotion Corporation Of Tamilnadu |
| SIPL | Sam Internation Pvt Ltd |
| SIPL | Samriddhi Infocom Pvt Ltd |
| SIPL | Satish Interiors Pvt Ltd |
| SIPL | Shelter Infra Projects Ltd |
| SIPL | Smart India Pvt Ltd |
| SIPL | Soil Investigation Pte Ltd |
| SIRA | Southern Indiana Radiological Associates |
| SIRC | Software Information Resource Corp |
| SIRC | Solar Integrated Roofing Corporation |
| SIRI | Safety Information Resources Inc |