| Abbreviation | Definition |
|---|---|
| SMU | Scale Models Unlimited |
| SMV | Sony Music Video |
| SMVRC | South Molton Vintage Rally Club |
| SMW | Strategic Management Works |
| SMW | Swedish Microwave |
| SMWA | Sheet Metal Works of Arizona |
| SMWA | Smoky Mountain Wedding Association |
| SMWC | Steven M. Wilson Concrete |
| SMX | Smithway Motor Xpress |
| SMX | Spatialmetrix Corporation |
| SMY | Santa Marina Yachts |
| SMZ | Special Management Zone |
| SMZ | Stanke Mccaughrean And Zinnecker |
| SNAC | Sierra Nevada Adventure Company |
| SNAC | Station North Arts Cafe |
| SNAF | Shanghai Navigation Aids Factory |
| SNB | Sahni Natarajan and Bahl |
| SNB | Sierra Nevada Brewing Company |
| SNB | Superior National Bank ( Hancock - Houghton - Calumet - Baraga - Lake Linden - Mohawk) |
| SNBK | Solar Non-Bank |