| SMUG | Saginaw Macintosh Users Group 
| Others |
| SMUG | Saints Monthly Union of Givers
| Others |
| SMUG | Salem Macintosh Users Group
| Others |
| SMUG | Sarasota Manatee Macintosh Users Group
| Others |
| SMUG | Seldom Met Users Group
| Others |
| SMUG | Serious Mac User Group
| Others |
| SMUG | Serious Macintosh Users Group
| Others |
| SMUG | Seriousness Manageability Urgency and Growth
| Others |
| SMUG | SFX MetaLib User Group
| Others |
| SMUG | Shenandoah Macintosh User Group
| Others |
| SMUG | Short Moment of Uncontrollable Grief
| Others |
| SMUG | Sierra Macintosh Users Group
| Others |
| SMUG | Small Multi User Game
| Others |
| SMUG | Social Media University Global
| Others |
| SMUG | Some Mildly Unique Guy
| Others |
| SMUG | South Mountain Users Group
| Others |
| SMUG | Southeast Management User Group
| Others |
| SMUG | Spokane Microcomputer Users Group
| Others |
| SMUG | Stanford Macintosh Users Group
| Others |
| SMUG | Stavanger Macintosh Users Group
| Others |
| SMUG | Strait Macintosh Users Group
| Others |
| SMUG | Sydney Microsoft Users Group
| Others |
| SMUG | Syracuse Macintosh Users Group
| Others |
| SMUG | Systems Management Users Group
| Others |