| Abbreviation | Definition |
|---|---|
| SXS | Southern Cross Sales |
| SYE | Sun Yorkos Enterprise Company, Ltd. |
| SYES | Sharon Yost Estate Sales |
| SYF | SolidifyYourFuture.com |
| SYG | SellYourGrapes.com |
| SYI | SellYourItem.com |
| SYI | Springville Youth Inc |
| SYL | Search Your Love |
| SYN | Syndicate |
| SYN | Synthetic Biologics, Inc. |
| SYP | Springfield Yellow Pages |
| SYR | Scot Young Research |
| SYR | ShoYoRoll.com |
| SYR | Stanford Yacht Research |
| SYT | Super Yacht Technologies |
| SYW | SoYouWanna.com |
| SYX | ShipYard Xchange |
| SZ | Sport Zone |
| SZA | Schuster- Zingheim and Associates, Inc. |
| SZA | Swann, Zane & Associates |