| IASS | I Am So Sorry 
| Others |
| IASS | Image Access Services Specification
| Others |
| IASS | Indigenous Australian Student Services
| Others |
| IASS | Information Advice and Support Services
| Others |
| IASS | Information Advice Service Stockport
| Others |
| IASS | Information Advice Support Services
| Others |
| IASS | Institute for Advanced Sustainability Studies
| Others |
| IASS | International Air Safety Summit
| Others |
| IASS | International Association for Semiotic Studies
| Others |
| IASS | International Association of Scandinavian Studies
| Others |
| IASS | International Association of Survey Statisticians
| Others |
| IASS | Inverter/ATCS (Active Thermal Control System) Support Structure
| Others |