| Acronym | Definition |
|---|
| IIIS➣International Institute of Informatics and Systemics |
| IIIS➣Institute for International Integration Studies (University of Ireland; Dublin, Ireland) |
| IIIS➣Institute for Integrated and Intelligent Systems (Griffith University; Australia) |
| IIIS➣Institutional Investor Information Service (est. 1995; Australia) |