NLP
- National Labour Party (disambiguation)
- National Liberal Party (disambiguation)
- National Liberation Party (disambiguation)
- National Library of Pakistan
- Natural Law Party
- Natural Law Party (Ireland)
- Natural Law Party (Trinidad and Tobago)
- Natural Law Party (United States)
- Natural Law Party of Canada
- Natural Law Party of Israel
- Natural Law Party of New Zealand
- Natural Law Party of Ontario
- Natural Law Party of Quebec
- Natural language processing
- Natural-language programming
- Neuro-linguistic programming
- Nonlinear programming