ISYS
| Acronym | Definition |
|---|---|
| ISYS | Institute for the Study of Youth Sports |
| ISYS | Intelligent Systems |
| ISYS | Integrated System |
| ISYS | Intelligent Systems Research Group (Madrid, Spain) |
| ISYS | Information System for Youth Services (processing system; Maryland Department of Juvenile Services) |
| ISYS | Instituto Sun Yat-Sen (Spanish: Sun Yat-Sen Institute; Panama; Chinese cultural center) |