| 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) |