| Abbreviation | Definition |
|---|---|
| SMA | Systems Management America |
| SMAB | Smurfit Munksjö Aspa Bruk, A. B. |
| SMAC | Stoughton Media Access Corporation |
| SMACNA | The Sheet Metal and Air Conditioning Contractors' National Association |
| SMAR | Smartsheet Inc. |
| SMB | Small and Medium Businesses |
| SMB | Special Mens' Business |
| SMB | Summit Media Broadcasting, L. L. C. |
| SMBB | Stammer, McKnight, Barnum, & Bailey - Attorneys At Law |
| SMBI | Stolle Milk Biologics Inc |
| SMBI | Stolle Milk Biologics, Inc. |
| SMC | Samick Music Corporation |
| SMC | San Miguel Corp |
| SMC | Seeburg Micro Computer |
| SMC | Sierra Monitor Corporation |
| SMC | Signal Measurement Corporation |
| SMC | Sintered Metals Corporation |
| SMC | Specialty Merchandise Corporation |
| SMC | Standard Motor Corporation |
| SMC | Sullivans Motor Company |