| Acronym | Definition |
|---|
| SIAC➣Southern Intercollegiate Athletic Conference |
| SIAC➣Special Immigration Appeals Commission (UK) |
| SIAC➣Singapore International Arbitration Centre (Singapore) |
| SIAC➣Sociedad Interamericana de Cardiología (Spanish: Interamerican Society of Cardiology) |
| SIAC➣Security Industry Alarm Coalition |
| SIAC➣School Improvement Advisory Committee |
| SIAC➣Società Italiana Assicurazione Crediti (Italian insurance company) |
| SIAC➣Senate Indian Affairs Committee (US Congress) |
| SIAC➣Specialized Information Analysis Center |
| SIAC➣Securities Industries Automation Corporation |
| SIAC➣Surrey Integrated Arts Consortium (UK) |
| SIAC➣Société Internationale des Artistes Chrétiens (International Secretariat of Christian Artists) |
| SIAC➣Self-Injection Anxiety Counseling |
| SIAC➣Senate Committee on Indian Affairs |
| SIAC➣Staten Island Athletic Club (New York) |
| SIAC➣Système Informatisé d'Aide à la Conduite (French: information system for train engineer in TGV-Trains) |
| SIAC➣Systèmes d'Information et d'Aide aux Concours (French: Information Systems and Support for Competition) |
| SIAC➣Strike Intelligence Analysis Center |
| SIAC➣Sensor Integration and Control |
| SIAC➣Submarine Integrated Attack Center |
| SIAC➣Site Improvement Advisory Council |
| SIAC➣Shape International Angling Club |
| SIAC➣System Integration And Control |