NN, Nn, or nn may refer to:

Businesses and organizations

Nationale-Nederlanden NN Group N.V. is the parent company of NN Investment Partners and Nationale-Nederlanden (). Nationale-Nederlanden is one of the largest insurance and asset management companies in the Netherlands. NN Group is headquartered in The Hague, its off ...

, a Dutch insurance company commonly referred to as NN *

Netroots Nation Netroots Nation is a political convention for American progressive political activists. Originally organized by readers and writers of Daily Kos, a liberal political blog, it was previously called YearlyKos and rebranded as Netroots Nation ...

, a political convention for American progressive activists *

Nevada Northern Railway The Nevada Northern Railway was a railroad in the U.S. state of Nevada, built primarily to reach a major copper producing area in White Pine County, Nevada. The railway, constructed in 1905–06, extended northward about from Ely to connection ...

(reporting mark NN) *

Norilsk Nickel Norilsk Nickel (russian: ГМК «Норильский никель»), or Nornickel, is a Russian nickel and palladium mining and smelting company. Its largest operations are located in the Norilsk–Talnakh area near the Yenisei River in the no ...

, а metallurgical and mining company *

VIM Airlines VIM Airlines (legally ''VIM Avia'') was a Russian charter airline headquartered in Moscow based at Domodedovo International Airport. It offered international scheduled and charter operations for both passengers and cargo as well as wet lease ser ...

(IATA airline designator NN) *

Nigerian Navy The Nigerian Navy (NN) is a branch of the Nigerian Armed Forces. It is among the largest navies on the African continent, consisting of several thousand personnel, including those of the Coast Guard. History The Nigerian Navy owes its origin t ...

, A part of the armed forces of Nigeria

Places

NN postcode area The NN postcode area, also known as the Northampton postcode area,Royal Mail, ''Address Management Guide'', (2004) is a group of nineteen postcode districts in England, within eight post towns. These cover most of Northamptonshire (including No ...

, UK, for areas of Northamptonshire, England *

Nizhniy Novgorod Nizhny Novgorod ( ; rus, links=no, Нижний Новгород, a=Ru-Nizhny Novgorod.ogg, p=ˈnʲiʐnʲɪj ˈnovɡərət ), colloquially shortened to Nizhny, from the 13th to the 17th century Novgorod of the Lower Land, formerly known as Gork ...

, a Russian city/major trading center

Science and technology

Nearest neighbor (disambiguation) Nearest neighbor may refer to: * Nearest neighbor search in pattern recognition and in computational geometry * Nearest-neighbor interpolation for interpolating data * Nearest neighbor graph in geometry * Nearest neighbor function in probability ...

, with several related uses in mathematics *

Net neutrality Network neutrality, often referred to as net neutrality, is the principle that Internet service providers (ISPs) must treat all Internet communications equally, offering users and online content providers consistent rates irrespective of co ...

, the principle that Internet service providers should treat all data the same * Neural network, a computing network inspired by biological neural networks *

Normalnull ("standard zero") or (short N. N. or NN ) is an outdated official vertical datum used in Germany. Elevations using this reference system were to be marked (“meters above standard zero”). has been replaced by (NHN). History In 187 ...

, a German height reference system preceding Normalhöhennull (NHN) * nn, the chemical symbol for the hypothetical element

Neutronium Neutronium (sometimes shortened to neutrium, also referred to as neutrite) is a hypothetical substance composed purely of neutrons. The word was coined by scientist Andreas von Antropoff in 1926 (before the 1932 discovery of the neutron) for the ...

Other uses

* N. N., a pseudonym of 18th-century Italian priest Camillo Almici * N. N., pseudonym of Russian economist

Sergei Prokopovich Sergei Nikolaevich Prokopovich (russian: Серге́й Николаевич Прокопович; 1871–1955) was a Russian economist, sociologist, Revisionist Social-Democrat and liberal politician. Life Prokopovich was born into a noble fa ...

* ''NN'' (film), a 2014 Peruvian film * is a digraph, see * Ñ, a letter in Spanish, originally derived from the written "nn" *

Double net lease In the field of commercial real estate, especially in the United States, a net lease requires the tenant to pay, in addition to rent, some or all of the property expenses that normally would be paid by the property owner (known as the "landlord" o ...

, a type of lease used for commercial real estate *

Nomen nescio ''Nomen nescio'' (), abbreviated to ''N.N.'', is used to signify an anonymous or unnamed person. From Latin ''nomen'' – "name", and ''nescio'' – "I do not know", it literally means "I do not know the name". The generic name Numerius Negidius ...

(Latin for "no name"), a person whose name is unknown * NN/nn,

Nynorsk Nynorsk () () is one of the two written standards of the Norwegian language, the other being Bokmål. From 12 May 1885, it became the state-sanctioned version of Ivar Aasen's standard Norwegian language ( no, Landsmål) parallel to the Dano-N ...

, a Norwegian written language (ISO 639 alpha-1 code "nn"). Sometimes used on websites to distinguish it from its counterpart Bokmål. E.g. nn.wikipedia.org vs no.wikipedia.org. *NN, the production code for the 1967 ''Doctor Who'' serial ''

The Abominable Snowmen ''The Abominable Snowmen'' is the mostly missing second serial of the fifth season of the British science fiction television series ''Doctor Who'', which originally aired in six weekly parts from 30 September to 4 November 1967. In this seri ...

'' * Nick Nurse, head coach of the NBA's Toronto Raptors {{disambiguation