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) National Party or Nationalist Party may refer to: Active parties * National Party of Australia * Bangladesh: ** Bangladesh Nationalist Party ** Jatiya Party (Ershad) a.k.a. ''National Party (Ershad)'' * California National Party * Nationalist Pa ...

, various political parties *

Ngee Ann Polytechnic Ngee Ann Polytechnic (NP) is a post-secondary education institution and statutory board under the purview of the Ministry of Education in Singapore. Established in 1963, the polytechnic is renowned for its business programmes. History Ngee An ...

, Singapore *

Nigeria Police Force The Nigeria Police Force is the principal law enforcement and the lead security agency in Nigeria. Designated by the 1999 constitution as the national police of Nigeria with exclusive jurisdiction throughout the country, as at 2016 it has a s ...

* Northern Pacific Railway (AAR reporting mark NP) *

November Project The November Project is a free, open-to-the-public exercise group founded in Boston, Massachusetts, in 2011. The name "November Project" comes from the Google Doc that the founders shared to track their progress in November 2011. While session ...

, free, open-to-the-public exercise group

Places

NP postcode area The NP postcode area, also known as the Newport postcode area,Royal Mail, ''Address Management Guide'', (2004) is a group of eighteen postcode districts, which are subdivisions of fourteen post towns. These cover south-east Wales, including Newp ...

, Newport, Wales, UK *

Nepal Nepal (; ne, :ne:नेपाल, नेपाल ), formerly the Federal Democratic Republic of Nepal ( ne, सङ्घीय लोकतान्त्रिक गणतन्त्र नेपाल ), is a landlocked country in S ...

(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 Purine nucleoside phosphorylase, PNP, PNPase or inosine phosphorylase () is an enzyme that in humans is encoded by the ''NP'' gene. It catalyzes the chemical reaction :purine nucleoside + phosphate \rightleftharpoons purine + alpha-D-ribose 1- ...

, an enzyme *

Nurse practitioner A nurse practitioner (NP) is an advanced practice registered nurse and a type of mid-level practitioner. NPs are trained to assess patient needs, order and interpret diagnostic and laboratory tests, diagnose disease, formulate and prescribe ...

* Kallikrein 8, an enzyme *

Neptunium Neptunium is a chemical element with the symbol Np and atomic number 93. A radioactive actinide metal, neptunium is the first transuranic element. Its position in the periodic table just after uranium, named after the planet Uranus, led to it bein ...

, symbol Np, a chemical element * Nosocomial pneumonia *

Natriuretic peptide A natriuretic peptide is a peptide that induces natriuresis, which is the excretion of sodium by the kidneys. Known natriuretic peptides include the following: * atrial natriuretic peptide, also known as ANP * brain natriuretic peptide, also known ...

Mathematics and computer science

NP (complexity) In computational complexity theory, NP (nondeterministic polynomial time) is a complexity class used to classify decision problems. NP is the set of decision problems for which the problem instances, where the answer is "yes", have proofs v ...

, Nondeterministic Polynomial, a computational complexity class **

NP-complete In computational complexity theory, a problem is NP-complete when: # it is a problem for which the correctness of each solution can be verified quickly (namely, in polynomial time) and a brute-force search algorithm can find a solution by trying ...

, a class of decision problems ** NP-hard, a class of problems in computational complexity **

Co-NP In computational complexity theory, co-NP is a complexity class. A decision problem X is a member of co-NP if and only if its complement is in the complexity class NP. The class can be defined as follows: a decision problem is in co-NP precisely ...

, a complexity class * Numpy a Python mathematical library *

Named Pipe In computing, a named pipe (also known as a FIFO for its behavior) is an extension to the traditional pipe concept on Unix and Unix-like systems, and is one of the methods of inter-process communication (IPC). The concept is also found in OS/2 and ...

a method for Inter-Process Communications (IPC)

Physics and chemistry

* NP junction or PN junction in a semiconductor device * Neper (Np), a logarithmic unit for ratios *

, a chemical element with symbol Np *

Power number : For Newton number, see also Kissing number in the sphere packing problem. The power number ''N''p (also known as Newton number) is a commonly used dimensionless number relating the resistance force to the inertia force. The power-number has d ...

(N_p), relating resistance force to inertia force *

Phosphorus nitride Phosphorus nitride refers to several chemical compounds of phosphorus and nitrogen: * Phosphorus mononitride * Tetraphosphorus hexanitride *Triphosphorus pentanitride Triphosphorus pentanitride is an inorganic compound with the chemical formula . ...

Other uses in science and technology

* New Proposal, in the

International Organization for Standardization The International Organization for Standardization (ISO ) is an international standard development organization composed of representatives from the national standards organizations of member countries. Membership requirements are given in Art ...

(ISO) standardization process *

Not placed A bill of materials or product structure (sometimes bill of material, BOM or associated list) is a list of the raw materials, sub-assemblies, intermediate assemblies, sub-components, parts, and the quantities of each needed to manufacture an end ...

, a term used in printed circuit board design to denote the omitting of a component *

Nanoparticle A nanoparticle or ultrafine particle is usually defined as a particle of matter that is between 1 and 100 nanometres (nm) in diameter. The term is sometimes used for larger particles, up to 500 nm, or fibers and tubes that are less than 10 ...

Noun phrase In linguistics, a noun phrase, or nominal (phrase), is a phrase that has a noun or pronoun as its head or performs the same grammatical function as a noun. Noun phrases are very common cross-linguistically, and they may be the most frequently oc ...

, in grammar

Other uses

No problem ''No problem'' is an English expression, used as a response to '' thanks'' (among other functions). It is regarded by some as a less formal alternative to ''you're welcome'', which shares the same function. Informality Some people find the expre ...

* Notary public, post-nominal