SIAC

SIAC is an acronym used by several bodies:
 * Securities Industry Automation Corporation
 * Singapore International Arbitration Centre
 * Sistema Integrado de Artilleria de Campaña, General Dynamics Santa Bárbara Sistemas
 * Southern Indiana Athletic Conference, a high school athletic conference
 * Southern Intercollegiate Athletic Conference, an NCAA Division II collegiate athletic conference
 * Special Immigration Appeals Commission
 * State Institute for Administrative Career, one of the six colleges at the Government Colleges Hostel, Mumbai