| Acronym | Meaning |
| NSP | NASA Support Plan |
| NSP | National HIV/AIDS Strategic Plan |
| NSP | National Search and Rescue Plan |
| NSP | National Selection Process |
| NSP | National Signatures Program |
| NSP | National Solidarity Party (Singapore) |
| NSP | National Solidarity Programme (Afghanistan) |
| NSP | National Strategic Plan (various organizations) |
| NSP | NATO Standardization Program |
| NSP | NATO Strike Plan |
| NSP | Naval Station Pascagoula (US Navy; Pascagoula, MS) |
| NSP | Naval Support Plan |
| NSP | Navy Space Project |
| NSP | Navy Strategic Plan (UK MoD) |
| NSP | Navy Support Plan |
| NSP | Neighborhood Stabilization Program |
| NSP | Nepal Sadbhavana Party (Nepal) |
| NSP | Network Support Plan |
| NSP | Nevada State Prison (Carson City, NV) |
| NSP | Newborn Screening Program (various locations) |
| NSP | Non-Standard Holding Pattern |
| NSP | Normal Safety Precaution (firearms) |
| NSP | Normal Safety Procedure(s) |
| NSP | North Saint Paul (Minnesota) |
| NSP | Nuclear Strike Plan |
| NSP | Nuclear Surety Procedure |