IACS

IACS may refer to:


 * Indian Association for the Cultivation of Science
 * Industrial Automation and Control Systems are also referred to as Industrial control systems
 * Innovation Academy Charter School
 * Integrated Administration and Control System
 * International Annealed Copper Standard, a unit of electrical conductivity
 * International Association of Classification Societies
 * International Association of Cryospheric Sciences
 * Inter-Asia Cultural Studies, a quarterly peer-reviewed academic journal