| Abbreviation | Definition |
|---|---|
| SMOA | Southwest Michigan Officials Association |
| SMOC | South Middlesex Opportunity Council |
| SMPTE | Society of Motion Picture and Television Engineers |
| SMR | Senior Manager Report |
| SMS | Sales and Marketing Society of the Midsouth |
| SMS | Singapore Mathematical Society |
| SMSA | State Motorcycle Safety Administrators |
| SMSCA | Short Message Service Competition Association |
| SMTO | Scottish Massage Therapists Organisation |
| SMWBE | Small, Minority and Woman-Owned Business Enterprise |
| SNAME | Society of Naval Architects and Marine Engineers |
| SNCC | Swiss Needle Cast Cooperative |
| SNCF | Singapore National Co-operative Federation |
| SND | Society for News Design |
| SNEH | Special Need Education Home |
| SNM | Society of Nuclear Medicine |
| SNPA | Society for Nordish Physical Anthroplogy |
| SNPA | Southern Newspaper Publishers Association |
| SNTSA | Southern Nevada Tourist Safety Association |
| SOCAN | Society of Composers, Authors and Music Publishers of Canada |