| SIAM | Salon Internacional del Automovil Mexico 
| Others |
| SIAM | Salon International de l'Auto de Montreal
| Others |
| SIAM | Salon International de l'Automobile de Monaco
| Others |
| SIAM | Salone Internazionale Dell'Auto e Della Moto
| Others |
| SIAM | Self Injury Awareness Movement
| Others |
| SIAM | Self-Initiated Antiaircraft Missile
| Others |
| SIAM | Service Integration And Management
| Others |
| SIAM | Sids Initial Assessment Meeting
| Others |
| SIAM | Sociedad Industrial Americana de Maquinas
| Others |
| SIAM | Societa Italiana Automobili Marittima
| Others |
| SIAM | Society for Industrial and Applied Mathematics
| Others |
| SIAM | Society of Indian Automobile Manufacturers
| Organization, Transport |
| SIAM | Society of Indian Automobile Manufactures
| Others |
| SIAM | Society of Industrial and Applied Mathematics
| Others |
| SIAM | Sound Image And Motion
| Others |
| SIAM | Southen Indiana Antique Machinery
| Others |
| SIAM | Standard Information Appliance Module
| Others |
| SIAM | Standards, Implementation, Action, Methodology
| Others |
| SIAM | Supporters In Area Music
| Others |