| Acronym | Definition |
|---|
| SISO➣Single Input, Single Output |
| SISO➣Serial in Serial Out |
| SISO➣Shift in Shift Out |
| SISO➣Simulation Interoperability Standards Organization |
| SISO➣Soft-Input, Soft-Output |
| SISO➣Society of Independent Show Organizers (US) |
| SISO➣Senior Information Security Officer (various organizations) |
| SISO➣Serial In, Serial Out |
| SISO➣Senior Intelligence Staff Officer (Australia) |
| SISO➣Second In, Second Out (accounting) |
| SISO➣Spiral-in-Spiral-out (resonator) |
| SISO➣Seguridad Industrial y Seguridad Operativa (Spanish: Industrial Safety and Operational Safety; Guatemala) |