CN

CN, cn and other variants may refer to:

Companies

• Canadian National Railway, reporting mark
• 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, US TV channel
  • List of international Cartoon Network channels

Places

• China, a sovereign state located in East Asia, ISO 3166 country code CN
• CN Centre, an arena in Prince George, British Columbia
• CN Tower, communications and observation tower in Toronto, Ontario

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, a chemical element with symbol Cn and atomic number 112
• 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
• 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_n (mathematics), 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

Other uses

• Cn (digraph), a digraph used in English for a few words of Greek origin
• Cnaeus or Gnaeus, a popular Roman praenomen
• Combined Nomenclature, EU customs coding
• Vehicle registration code for County Cavan, Ireland
• Vehicle registration code for Province of Cuneo, Italy
• Group CN a category of prototype racing cars.

See also

• CNN, an American basic cable and satellite television channel
• All pages with titles beginning with CN