XSI
XSI may refer to:
- Softimage XSI, a high-end three-dimensional (3D) graphics application
- South Indian Lake Airport, the IATA code for the airport in Canada
- Canon EOS 450D, known as EOS Rebel XSi in North America, a DSLR camera from Canon
- X/Open System Interfaces Extension, a supplementary specification to the Single UNIX Specification
- A conventional XML namespace prefix for XML Schema instance information
- Broadsoft Xtended Services Interface, a set of APIs for integrating BroadWorks functions with Internet services
This disambiguation page lists articles associated with the title XSI.
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