| Acronym | Definition |
|---|
| SSDU➣Session Layer Service Data Unit |
| SSDU➣Session Service Data Unit |
| SSDU➣Service, Security and Its Data Management Technologies in Ubi-Comp |
| SSDU➣Semi-Submersible Drilling Unit |
| SSDU➣Surgical Step Down Unit (hospital unit) |
| SSDU➣Staff Support and Development Unit (University of Sydney; Australia) |