SDDI
| Acronym | Definition |
|---|---|
| SDDI | STP (Shielded Twisted-Pair) Distributed Data Interface |
| SDDI | Shielded Distributed Data Interface |
| SDDI | Serial Digital Data Interface |
| SDDI | Student Detail Data Interchange (Arizona Department of Education) |
| SDDI | SADC (South African Development Community)-DRFN (Desert Research Foundation of Namibia) Desertification Interact (agro-forestry) |