International Accounting Standards
International Association for Semiotic Studies
Inverter/ATCS Support Structure
indolyl aryl sulfones
Insurance Accounting and Statistical Society
Integrated Astrionic Spacecraft System
Intelligent Automation Systems Services
International Association for Shell and Spatial Structures
International Association for Survey Statisticians
International Association of Sanskrit Studies
International Association of Security Service
International Association of Soil Science
International Association of Survey Statisticians
Internet Alphaserver System Software
Inspecteur de l'Action Sanitaire et Sociale
International Association of Shells and Spatial