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 Sociedad Interamericana de Astronomía en la Cultura 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, Mumbai, see Government Colleges Hostel, Mumbai Southern Irish Asphalt Company SIAC Construction