| Acronym | Definition |
|---|
| XSI➣Exchangeable Solution for Instrumentation |
| XSI➣Extended Service Interface |
| XSI➣XML Schema Instance |
| XSI➣X/Open System Interface |
| XSI➣Xanadu Servers Inc. (Internet solutions firm; Meridian, ID) |
| XSI➣Xybernaut Solutions Inc. (Vienna, VA) |
| XSI➣Express Ship Interface (SAP system) |
| XSI➣Xenos Summer Institute |