NDP
- Democratic National Party (disambiguation)
- NDP (gene)
- Nagaland Democratic Party
- National Day of Prayer
- National Defence Party (disambiguation)
- National Democratic Movement (Bosnia and Herzegovina)
- National Democratic Party (disambiguation)
- National Democratic and Labour Party
- National Democrats (disambiguation)
- National Development Party (disambiguation)
- National Development Plan
- National Development Policy
- Nebraska Democratic Party
- Neighbor Discovery Protocol
- Neodymium phosphide
- Net domestic product
- Neutron depth profiling
- New Democratic Party
- New Democratic Party (disambiguation)
- New Douglas Park
- Newfoundland Democratic Party
- Nondeterministic programming
- Nortel Discovery Protocol
- Northern Dutchess Paramedics
- Northumberland Development Project
- Norwegian Petroleum Directorate
- Notre-Dame de Paris
- Nuclear Disarmament Party
- Singapore National Day Parade