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

Companies

  • Canadian National Railway, reporting mark CN
  • China Netcom, a former telecommunication service provider in China, NYSE symbol
  • Collegiate Network, supporting college publications
  • Grand China Air, IATA code CN
  • Islands Nationair, an airline based in Port Moresby, Papua New Guinea, IATA code CN
  • Westward Airways (Nebraska), a former airline, IATA code CN (dissolved 2005)<!--The 3 airlines listed here are all listed as having IATA code CN ?!-->

Media and entertainment

  • Cartoon Network, an American cable channel
  • List of international Cartoon Network channels
  • The Cartoon Network, Inc., an American entertainment company which operates the channel
  • CN23 (Cultura y Noticias 23), a defunct Argentine news channel

Places

  • Canada, which has ISO 3166 country code "CA" but is sometimes abbreviated "CN" by American organizations to disambiguate from California
  • China (People's Republic of China), ISO 3166 country code CN
  • CN Centre, an arena in Prince George, British Columbia
  • CN Tower, communications and observation tower in Toronto, Ontario
  • Station code for Cirebon railway station
  • Circuito Norte, national highway of Cuba

Mathematics, science, and technology

Biology

  • Computational neuroethology, the study of animal behavior and its control by the nervous system
  • Cranial nerves, CN 0 to CN XII

Chemistry

  • CN gas, a substituted acetophenone used as a riot control agent
  • Copernicium, symbol Cn, a chemical element
  • Cyanide, any chemical compound that contains a carbon atom triple-bonded to a nitrogen atom, -CN
  • Cyano radical, molecular formula ·CN
  • Cyanogen, a colorless, toxic gas with a pungent odor, (CN)<sub>2</sub>

Computing

  • .cn, country code top-level domain for mainland China
  • Cloud native computing, an approach in software development
  • Common Name, an attribute of the Lightweight Directory Access Protocol protocol family
  • Common Name, an attribute of X.509 public-key certificates
  • VIA CN, a 64-bit CPU for personal computers

Mathematics

  • C<sub>n</sub>, a cyclic group
  • C<sub>n</sub>, a classical root system
  • cn (elliptic function), one of Jacobi's elliptic functions

Other uses in mathematics, science, and technology

  • Carrier-to-noise ratio C/N, the signal-to-noise ratio of a modulated signal
  • Curve number, a parameter used in hydrology for predicting direct runoff or infiltration from rainfall
  • cN, abbreviation for centinewton, a force equal to one hundredth of a newton
  • Classical nova, a type of cataclysmic variable star

Other uses

  • Cn (digraph), a digraph used in English for a few words of Greek origin
  • Cnaeus (disambiguation) or Gnaeus (disambiguation), popular Roman praenomens
  • Combined Nomenclature, EU customs coding
  • Vehicle registration code for County Cavan, Ireland
  • Vehicle registration code for Province of Cuneo, Italy
  • Aircraft registration code for Morocco
  • Group CN, a category of prototype racing cars
  • Citation needed, a template on Wikipedia

See also

  • CNN, an American basic cable and satellite television channel