NPS
- NPS MedicineWise
- NPS Pharmaceuticals
- Nail–patella syndrome
- National Park Service
- National Park Service (Taiwan)
- National Party of Scotland
- National Party of Suriname
- National Pension Service
- National Pension System
- National Phobics Society
- National Piers Society
- National Poetry Slam
- National Probation Service
- National Prosecution Service
- National Public School, Indiranagar
- Naval Postgraduate School
- Nederlandse Programma Stichting
- Net promoter score
- Network Policy Server
- Neuropeptide S
- Neutral Paralympic Athletes at the 2024 Summer Paralympics
- New Penguin Shakespeare
- New Socialist Party (San Marino)
- Nigerian Prisons Services
- Nominal Pipe Size
- Nonpoint source pollution
- Novel psychoactive substance
- Nunavik Police Service
- People's Movement of Serbia