Other
- Network Design Problem in computer science first suggested by Drezner and Wesolowsky (1997).
- National Day Parade in Singapore
- National Development Plan in Ireland
- National Development Policy in Malaysia
- NDP (gene), Norrie Disease (Pseudoglioma), a human gene
- Nondeterministic programming
- Neighbor Discovery Protocol, an Internet protocol
- Net Domestic Product, an economic quantity
- Nortel Discovery Protocol, a layer two Internet protocol, also called SONMP
- Northern Dutchess Paramedics, an advanced life support ambulance service in the Hudson Valley New York.
- Norwegian Petroleum Directorate, a Norwegian government agency responsible for the regulation of Norwegian oil resources
- Nationally Determined Parameters in Europe, a collection of codes/parameters for constructions, more details are available on Eurocodes.
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