SSSI
| Acronym | Definition |
|---|---|
| SSSI | Site of Special Scientific Interest (British Wildlife and Countryside Act 1981) |
| SSSI | Site of Special Scientific Interest (under Antarctic Treaty) |
| SSSI | Solid State Storage Initiative (Storage Networking Industry Association) |
| SSSI | Steelman Software Solutions, Inc. (Ontario, Canada) |
| SSSI | Skin and Skin Structure Infection |
| SSSI | Strategic Security Solutions International (Afghanistan) |
| SSSI | Soil Science Society of Ireland |
| SSSI | Signatures, Sensors, and Signal-processing Integration |