NSDU
| Acronym | Definition |
|---|---|
| NSDU | Network Layer Service Data Unit |
| NSDU | Network Service Data Unit (SS7 SCCP) |
| NSDU | Non-Stop Dual Unwinder (labels) |
| NSDU | National Self-Determination Union (politics) |
| NSDU | National Society Daughters of the Union (est. 1912; New Albany, IN) |
| NSDU | National Systems Development Unit (US DOI) |