• Na (kana)
  Na (kana)
  な, in hiragana, or ナ in katakana, is one of the Japanese kana, which each represent one mora. The hiragana な is made in four strokes, the katakana ナ two. Both represent . な and ナ originate from the man'yōgana 奈. な is used as part of the okurigana for the plain negative forms of Japanese verbs, and...
  
  , a Japanese kana
• Na (tree) or Mesua ferrea, a species of tree native to Sri Lanka
• .na
  .na
  .na is the Internet country code top-level domain for Namibia. Registry/Registrar Separation has been implemented, with Namibian and Foreign Registrars being accredited...
  
  , the top-level domain for Namibia
• Na people, a small tribal group in India
• Mosuo
  Mosuo
  Known to many as the Mosuo , but known often to themselves as the Na, the Mosuo are a small ethnic group living in Yunnan and Sichuan Provinces in China, close to the border with Tibet...
  
   or Na, a small ethnic group in China near Tibet
• Nauruan language
  Nauruan language
  The Nauruan language is an Austronesian language spoken in Nauru. It is estimated that it has 7,000 speakers. Almost all speakers are bilingual in English....
  
   ISO code
• Sodium
  Sodium
  Sodium is a chemical element with the symbol Na and atomic number 11. It is a soft, silvery-white, highly reactive metal and is a member of the alkali metals; its only stable isotope is 23Na. It is an abundant element that exists in numerous minerals, most commonly as sodium chloride...
  
  's chemical symbol

• North America
  North America
  North America is a continent wholly within the Northern Hemisphere and almost wholly within the Western Hemisphere. It is also considered a northern subcontinent of the Americas...
  
  , a continent
• Avogadro constant or N_A
• Namibia
  Namibia
  Namibia, officially the Republic of Namibia , is a country in southern Africa whose western border is the Atlantic Ocean. It shares land borders with Angola and Zambia to the north, Botswana to the east and South Africa to the south and east. It gained independence from South Africa on 21 March...
  
  's ISO country code
• NA, Naples' Italian car number plates provincial designator
• Narcotics Anonymous
  Narcotics Anonymous
  Narcotics Anonymous is a twelve-step program modeled after Alcoholics Anonymous describing itself as a "fellowship or society of men and women for whom drugs had become a major problem," and it is the second-largest 12-step organization...
  
  , a twelve-step program that focuses on addiction
• National Academician, a member of the National Academy of Design
• National Alliance (Netherlands)
  National Alliance (Netherlands)
  The National Alliance was a Dutch nationalist political party. The party was disbanded in 2007.The party was formed on 12 November 2003, by Jan Teijn and Virginia Kapić. Teijn kicked off his political career in the Centrum Democraten in Rotterdam, before going over to the CP'86, where he was one...
  
  , a former Dutch political party
• National Association (N.A.), a United States term indicating a national bank
  National bank
  In banking, the term national bank carries several meanings:* especially in developing countries, a bank owned by the state* an ordinary private bank which operates nationally...
  
  
• National Association of Professional Base Ball Players
  National Association of Professional Base Ball Players
  The National Association of Professional Base Ball Players , or simply the National Association , was founded in 1871 and continued through the 1875 season...
  
  , the first professional baseball league
• NA, Netherlands Antilles' former international vehicle registration code
• Neuroacanthocytosis
  Neuroacanthocytosis
  Neuroacanthocytosis is a term that refers to a group of genetically diverse conditions complicated by movement disorders, neurological problems and spiculated red blood cells...
  
  
• Neurotics Anonymous, the predecessor to Emotions Anonymous
  Emotions Anonymous
  Emotions Anonymous is a twelve-step program for recovery from mental and emotional illness. there were approximately 1,100 EA groups active in the United States. EA is the largest of three organizations that have adapted the Twelve Steps of Alcoholics Anonymous to create a program for people...
  
  
• Noradrenaline or Norepinephrine, a hormone
• North American Airlines
  North American Airlines
  North American Airlines, Inc. is an American airline with its headquarters in Building 141 on the grounds of John F. Kennedy International Airport in Jamaica, Queens, New York City, USA. Prior to May 2008, it operated scheduled international services from the USA to Africa and Guyana. Today, it...
  
  's IATA code
• Nucleic acid analogues
  Nucleic acid analogues
  Nucleic acid analogues are compounds structurally similar to naturally occurring RNA and DNA, used in medicine and in molecular biology research....
  
  , given various abbreviations terminating in NA
• Numerical aperture
  Numerical aperture
  In optics, the numerical aperture of an optical system is a dimensionless number that characterizes the range of angles over which the system can accept or emit light. By incorporating index of refraction in its definition, NA has the property that it is constant for a beam as it goes from one...
  
  , a dimensionless number that characterizes a range of angles

See also

• n/a
  N/A
  n/a, which uses lowercase letters, is a common abbreviation for not applicable or not available, used to indicate when information in a certain field on a table is not provided, either because it does not apply to a particular case in question or because it is not available...
  
  , abbreviation for not applicable
• Virgin New Adventures
  Virgin New Adventures
  The Virgin New Adventures were a series of novels from Virgin Publishing based on the British science-fiction television series Doctor Who...
  
  or NAs, a series of Doctor Who novels
• Na Na (disambiguation)
• Na Na Na (disambiguation)