| Abbreviation | Definition |
|---|---|
| SORTW | Gunther International, LTD. Warrants (de-listed) |
| SOSDE | Sensotron, Inc. |
| SOSDE | Sensotron, Incorporated (de-listed) |
| SOSDE | Sensotron, Incorporated (de-listed) |
| SOSS | S O S Staffing Services, Inc. |
| SOSS | SOS Staffing Services, Incorporated (de-listed) |
| SOSS | SOS Staffing Services, Incorporated (de-listed) |
| SOST | R M S Titanic, Inc. |
| SOST | RMS Titanic, Incorporated (de-listed) |
| SOST | RMS Titanic, Incorporated (de-listed) |
| SOTK | Sono-Tek Corporation |
| SOTR | SouthTrust Corporation |
| SOUV | South Valley Bancorp |
| SOVIE | Styles On Video, Inc. |
| SOVIE | Styles On Video, Incorporated (de-listed) |
| SOVIE | Styles On Video, Incorporated (de-listed) |
| SOVY | Sonoma Valley Bank of California |
| SOVY | Sonoma Valley Bank of California (de-listed) |
| SOVY | Sonoma Valley Bank of California (de-listed) |
| SOWKE | ound Works International |