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)
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)2
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 Cn, a cyclic group Cn, 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