| Acronym | Definition |
|---|
| ICASS | International Cooperative Administrative Support Services (US Department of State billing mechanism for embassy-provided services) |
| ICASS | Institut Català d'Assistència i Serveis Socials (Barcelona, Spain) |
| ICASS | International Congress of Arctic Social Sciences |
| ICASS | International Conference on Advances in Steel Structures |
| ICASS | International Conference on Analytical Sciences and Spectroscopy |
| ICASS | Innovators Counselling and Advisory Service for Scotland (UK) |
| ICASS | International Confidential Aviation Safety Systems (group) |
| ICASS | Integrated Computer Assisted Surveillance System |
| ICASS | Integrated Control for Autonomous Space Systems |
| ICASS | Internal Continuous Assessment (South Africa) |
| ICASS | Indian Collaborative Acute Stroke Study |
| ICASS | Internal Cooperative Agreement Support and Services |
| ICASS | Intermodal Community Air Service System |
| ICASS | Integrated Care Social Support (program) |
| ICASS | Integrated Communications & Administrative Support System |