JN

JN or Jn may refer to:

• Excel Airways (1994-2008, IATA airline designator)
• Livingston Compagnia Aerea (2012-2014, IATA airline designator), an Italian airline
• Jan Mayen (FIPS PUB 10-4 territory code), an island in the Arctic Ocean
• Gospel of John, in Christian scripture
• Johnson–Nyquist noise, electrical noise generated by random thermal motion in a conductor
• Jornal de Notícias, a Portuguese newspaper
• Jornal Nacional, a Brazilian flagship news program broadcast by TV Globo
• Jornal Nacional, former title of the Portuguese news program Jornal da 8 that is broadcast by TVI
• al-Nusra Front, a Syrian militant group in the Syrian Civil War
• JN, the official symbol for the Nambu Line in Japan
• Jitsugyo no Nihon Sha, a Japanese publishing company

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