NPP
- N-Phenethyl-4-piperidinone
- N-Terminal peptide of proopiomelanocortin
- Nandrolone phenylpropionate
- National Patriotic Party
- National People's Party (disambiguation)
- National Priorities Project
- National Progress Party of Armenia
- Net primary production
- New Patriotic Party
- New Payments Platform
- New People's Party (Hong Kong)
- New Play Project
- New Politics Party
- New Power Party
- New Progressive Party (South Korea)
- New Progressive Party of Puerto Rico
- Nigerian People's Party
- No party preference
- Nobel Peace Prize
- Non-Public Property
- Northern People's Party
- Notepad++
- Nuclear power plant
- Nucleotide pyrophosphatase/phosphodiesterase
- Scientific production association
- Suomi NPP