NP may refer to:

Arts and entertainment

* ''NP'' (novel), by Japanese author Banana Yoshimoto

Organizations

Nashua-Plainfield Community School District Nashua-Plainfield Community School District (N-P) is a rural, public school district headquartered in Nashua, Iowa. The district, serving Nashua and Plainfield, occupies sections of four counties: Bremer, Butler, Chickasaw, and Floyd. It ...

, Iowa, United States * National Party (disambiguation), various political parties * Ngee Ann Polytechnic, Singapore * Nigeria Police Force *

Northern Pacific Railway The Northern Pacific Railway was a transcontinental railroad that operated across the northern tier of the western United States, from Minnesota to the Pacific Northwest. It was approved by Congress in 1864 and given nearly of land grants, whic ...

(AAR reporting mark NP) * November Project, free, open-to-the-public exercise group

Places

* NP postcode area, Newport, Wales, UK * Nepal (ISO 3166-1 alpha-2 country code NP) ** .np, the country code top level domain (ccTLD) for Nepal

Science, technology and mathematics

Biology and medicine

* Nucleoside phosphorylase, an enzyme * Nurse practitioner * Kallikrein 8, an enzyme * Neptunium, symbol Np, a chemical element * Nosocomial pneumonia * Natriuretic peptide

Mathematics and computer science

* NP (complexity), Nondeterministic Polynomial, a computational complexity class ** NP-complete, a class of decision problems ** NP-hard, a class of problems in computational complexity ** Co-NP, a complexity class * Numpy a Python mathematical library * Named Pipe a method for Inter-Process Communications (IPC)

Physics and chemistry

* p–n junction, NP junction or PN junction in a semiconductor device * Neper (Np), a logarithmic unit for ratios * Neptunium, a chemical element with symbol Np * Power number (N_p), relating resistance force to inertia force * Phosphorus nitride

Other uses in science and technology

* New Proposal, in the International Organization for Standardization#Standardization process, International Organization for Standardization (ISO) standardization process * Not placed, a term used in printed circuit board design to denote the omitting of a component * Nanoparticle * Noun phrase, in grammar

Other uses

* No problem * Notary public, post-nominal