CN, Cn, cn and other variants may refer to:

Companies

Canadian National Railway The Canadian National Railway Company () is a Canadian Class I freight railway headquartered in Montreal, Quebec, which serves Canada and the Midwestern and Southern United States. CN is Canada's largest railway, in terms of both revenue a ...

, reporting mark CN *

China Netcom China Netcom, full name China Netcom Group Corporation (Hong Kong) Limited (former stock codes: HKEX:0906, NYSE:CN), abbreviated CNC, was a telecommunication service provider in People's Republic of China. It was formed in August 1999 by the Chin ...

, a former telecommunication service provider in China, NYSE symbol *

Collegiate Network The Collegiate Network (CN) is a program that provides financial and technical assistance to student editors and writers of roughly 100 independent, conservative and libertarian publications at colleges and universities around the United States. ...

, supporting college publications *

Grand China Air Grand China Air is a Chinese airline based at Haikou Meilan International Airport. History Grand China Air was formed on 29 November 2007 under the initiative of the HNA group's largest operational entity, Hainan Airlines, to merge its operati ...

IATA code CN * Islands Nationair, an airline based in Port Moresby, Papua New Guinea, IATA code CN *

Westward Airways (Nebraska) Westward Airways was a regional airline based in Scottsbluff, Nebraska.Flight International April 12–18, 2005 It ceased flight operations on July 25, 2005. History The airline was established in 2002 and started operations on June 1, 2004, w ...

, a former airline, IATA code CN (dissolved 2005)

Media and entertainment

Cartoon Network Cartoon Network (CN) is an American cable television television channel, channel and the flagship property of the Cartoon Network, Inc., a sub-division of the Warner Bros. Discovery Networks division of Warner Bros. Discovery. It launched on ...

, an American cable channel **

List of international Cartoon Network channels The Cartoon Network, Inc. (TCN) is an American multinational entertainment company operating as a unit of Warner Bros. Discovery. Founded by Ted Turner and based out of Atlanta, Georgia, its main properties include Cartoon Network, Boomerang, ...

Places

China China, officially the People's Republic of China (PRC), is a country in East Asia. With population of China, a population exceeding 1.4 billion, it is the list of countries by population (United Nations), second-most populous country after ...

(People's Republic of China), ISO 3166 country code CN *

CN Centre The CN Centre is a 5,971-seat multi-purpose arena, in Prince George, British Columbia, Canada. It was designed by PBK Architects, opened in 1995 and is owned by the City of Prince George. There are 14 luxury suites. In 2005, Canadian National ...

, an arena in Prince George, British Columbia *

CN Tower The CN Tower () is a communications and observation tower in Toronto, Ontario, Canada. Completed in 1976, it is located in downtown Toronto, built on the former Railway Lands. Its name "CN" referred to Canadian National, the railway co ...

, communications and observation tower in Toronto, Ontario *Station code for

Cirebon railway station Cirebon Station (, Station Code: CN) also known as Cirebon Kejaksan Station is the main railway station in the Cirebon area located on Siliwangi Street, Kebonbaru, Kejaksan, Cirebon City, West Java Province. Situs resmi PT. Kereta Api Indonesia (P ...

Circuito Norte The ''Circuito Norte'' (CN), meaning "Northern Circuit", is a west-east highway spanning the length of the island of Cuba, through the Atlantic Ocean, Atlantic Coast. With a length of 1,222 km, it is the second-longest Cuban highway, afte ...

, national highway of Cuba

Mathematics, science, and technology

Biology

Computational neuroethology Neuroethology is the evolutionary and comparative approach to the study of animal behavior and its underlying mechanistic control by the nervous system. It is an interdisciplinary science that combines both neuroscience (study of the nervous s ...

, the study of animal behavior and its control by the nervous system *

Cranial nerve Cranial nerves are the nerves that emerge directly from the brain (including the brainstem), of which there are conventionally considered twelve pairs. Cranial nerves relay information between the brain and parts of the body, primarily to and f ...

s, CN 0 to CN XII

Chemistry

CN gas Phenacyl chloride, also commonly known as chloroacetophenone, is a substituted acetophenone. It is a useful building block in organic chemistry. Apart from that, it has been historically used as a riot control agent, where it is designated CN. I ...

, a substituted acetophenone used as a riot control agent *

Copernicium Copernicium is a synthetic chemical element; it has symbol Cn and atomic number 112. Its known isotopes are extremely radioactive, and have only been created in a laboratory. The most stable known isotope, copernicium-285, has a half-life of ap ...

, symbol Cn, a chemical element *

Cyanide In chemistry, cyanide () is an inorganic chemical compound that contains a functional group. This group, known as the cyano group, consists of a carbon atom triple-bonded to a nitrogen atom. Ionic cyanides contain the cyanide anion . This a ...

, any chemical compound that contains a carbon atom triple-bonded to a nitrogen atom, -CN **

Cyano radical The cyano radical (or cyanido radical) is a radical with molecular formula CN, sometimes written •CN. The cyano radical was one of the first detected molecules in the interstellar medium, in 1938. Its detection and analysis was influential in as ...

, molecular formula ·CN *

Cyanogen Cyanogen is the chemical compound with the chemical formula, formula . Its structure is . The simplest stable carbon nitride, it is a Transparency and translucency, colorless and highly toxic gas with a pungency, pungent odor. The molecule is a ...

, a colorless, toxic gas with a pungent odor, (CN)₂

Computing

* .cn, country code top-level domain for mainland China *

Cloud native computing Cloud native computing is an approach in software development that utilizes cloud computing to "build and run scalable applications in modern, dynamic environments such as public, private, and hybrid clouds". These technologies, such as containers ...

, an approach in software development * Common Name, an attribute of the

Lightweight Directory Access Protocol The Lightweight Directory Access Protocol (LDAP ) is an open, vendor-neutral, industry standard application protocol for accessing and maintaining distributed directory information services over an Internet Protocol (IP) network. Directory serv ...

protocol family * Common Name, an attribute of

X.509 In cryptography, X.509 is an International Telecommunication Union (ITU) standard defining the format of public key certificates. X.509 certificates are used in many Internet protocols, including TLS/SSL, which is the basis for HTTPS, the secure ...

public-key certificates *

VIA CN The VIA Nano (formerly code-named VIA Isaiah) is a 64-bit CPU for personal computers. The VIA Nano was released by VIA Technologies in 2008 after five years of development by its CPU division, Centaur Technology. This Isaiah 64-bit architectu ...

, a 64-bit CPU for personal computers

Mathematics

* C_n, a

cyclic group In abstract algebra, a cyclic group or monogenous group is a Group (mathematics), group, denoted C_n (also frequently \Z_n or Z_n, not to be confused with the commutative ring of P-adic number, -adic numbers), that is Generating set of a group, ge ...

* C_n, a classical

root system In mathematics, a root system is a configuration of vector space, vectors in a Euclidean space satisfying certain geometrical properties. The concept is fundamental in the theory of Lie groups and Lie algebras, especially the classification and ...

cn (elliptic function) In mathematics, the Jacobi elliptic functions are a set of basic elliptic functions. They are found in the description of the motion of a pendulum, as well as in the design of electronic elliptic filters. While trigonometric functions are defined ...

, one of Jacobi's elliptic functions

Other uses in mathematics, science, and technology

Carrier-to-noise ratio In telecommunications, the carrier-to-noise ratio, often written CNR or ''C/N'', is the signal-to-noise ratio (SNR) of a modulated signal. The term is used to distinguish the CNR of the radio frequency passband signal from the SNR of an analog ...

''C/N'', the signal-to-noise ratio of a modulated signal *

Curve number The runoff curve number (also called a curve number or simply CN) is an empirical parameter used in hydrology for predicting direct runoff (hydrology), runoff or Infiltration (hydrology), infiltration from rainfall excess. The curve number method w ...

, a parameter used in hydrology for predicting direct runoff or infiltration from rainfall * cN, abbreviation for

centinewton The newton (symbol: N) is the unit of force in the International System of Units (SI). Expressed in terms of SI base units, it is 1 kg⋅m/s2, the force that accelerates a mass of one kilogram at one metre per second squared. The unit is ...

, a force equal to one hundredth of a newton *

Classical nova A nova ( novae or novas) is a transient astronomical event that causes the sudden appearance of a bright, apparently "new" star (hence the name "nova", Latin for "new") that slowly fades over weeks or months. All observed novae involve white ...

, a type of cataclysmic variable star

Other uses

Cn (digraph) This is a list of digraphs used in various Latin alphabets. In the list, letters with diacritics are arranged in alphabetical order according to their base, e.g. is alphabetised with , not at the end of the alphabet, as it would be in Danish, ...

, a digraph used in English for a few words of Greek origin *

Cnaeus (disambiguation) Gnaeus, also spelled Cnaeus, was a Roman praenomen derived from the Latin ''naevus'', a birthmark. It was a common name borne by many individuals throughout Roman history, including: Individuals * Gnaeus Acerronius Proculus, a consul of the Roman ...

Gnaeus (disambiguation) Gnaeus, also spelled Cnaeus, was a Roman praenomen derived from the Latin ''naevus'', a birthmark. It was a common name borne by many individuals throughout Roman history, including: Individuals * Gnaeus Acerronius Proculus, a consul of the Roman ...

, popular Roman praenomens *

Combined Nomenclature Council Regulation (EEC) No 2658/87 of 23 July 1987, creates the goods nomenclature called the Combined Nomenclature, or in abbreviated form 'CN', established to meet, at one and the same time, the requirements both of the Common Customs Tariff an ...

, EU customs coding * Vehicle registration code for

County Cavan County Cavan ( ; ) is a Counties of Ireland, county in Republic of Ireland, Ireland. It is in the Provinces of Ireland, province of Ulster and is part of the Northern and Western Region. It is named after the town of Cavan and is based on the hi ...

, Ireland * Vehicle registration code for

Province of Cuneo The province of Cuneo (; ) is a province in the Piedmont region of Italy. To the west, it borders the French region of Provence-Alpes-Côte d'Azur ( departments of Alpes-Maritimes, Alpes-de-Haute-Provence and Hautes-Alpes), to the north the ...

, Italy * Aircraft registration code for

Morocco Morocco, officially the Kingdom of Morocco, is a country in the Maghreb region of North Africa. It has coastlines on the Mediterranean Sea to the north and the Atlantic Ocean to the west, and has land borders with Algeria to Algeria–Morocc ...

Group CN Group CN is a category of vehicles used in motorsport, introduced by the FIA in 1993 for sports car racing. Group CN cars are mainly used in hillclimbing championships or sports racing series. Group CM is a non-FIA class which is closely rel ...

, a category of prototype racing cars