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Not to be confused with ln (with first letter "L"), the notation of the natural logarithm.

IN, In or in may refer to:



India-related codes[edit]

  • IN, The country code of India in several standards
  • .in, the internet top-level domain of India
  • in, former ISO 639-1 language code for Indonesian ("id" is used since November 3, 1989)

Indiana-related codes[edit]

Other codes[edit]

  • IN, the German car license plate code of Ingolstadt
  • IN, the International Air Transport Association airline designator of MAT Macedonian Airlines, Republic of Macedonia


  • Imperishable Night, the eighth official game in the Japanese Touhou series
  • In Nomine, a title given to any of numerous short pieces of English polyphonic instrumental or vocal music during the 16th and 17th centuries
  • Independent Network, a UK-based political association
  • Indian Navy, part of the India military
  • Intelligent Network, a telecommunication network standard
  • Intra Nasal (insufflation), a method of administrating some medications and vaccines
  • Infantry, the branch of a military force that fights on foot.


  • In., abbreviation for inch, a unit of length
  • In, chemical symbol for Indium, the element of atomic number 49

See also[edit]