| Abbreviation | Definition |
|---|---|
| ST | Springfield Terminal Railway (Pan Am Railways) |
| ST | ST Rail System |
| STAU | Star Shipping A Norway |
| STAX | OCI Chemical Corporation |
| STAX | Stauffer Chemical (OCI Chemical Corporation) |
| STCX | Sterling China |
| STCX | Sterling China Company |
| STE | Special Ticket Examiner |
| STE | Stockton Terminal and Eastern RailRoad |
| STER | St. Thomas and Eastern Railway |
| STEX | Sterling Chemicals |
| STEX | Sterling Chemicals Incorporated |
| STGX | South Texas Grain |
| STGX | South Texas Grain Company Incorporated |
| STJX | Stone Container (Canada) Incorporated |
| STJX | Stone Container Canada |
| STLB | STeiermarkische LandesBahnen (Styrian Provincial Railways) |
| STLE | St. Louis & Evansville Railroad Co. |
| STLH | St. Lawrence and Hudson Railway (Canadian Pacific Railway) |
| STLH | St. Lawrence and Hudson Railway Company Limited |