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, 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