SISI
| Acronym | Definition |
|---|---|
| SISI | Sistema de Solicitudes de Información (a la Administración Pública Federal; Mexico) |
| SISI | Short Increment Sensitivity Index |
| SISI | Standards and Indicators for School Improvement |
| SISI | Sports Illustrated Swimsuit Issue |
| SISI | Small Industries Service Institutes (India) |
| SISI | Spinal Injuries Survey Instrument |
| SISI | Software Implementation Stage of Integration |