Organizations

• Air Tahiti Nui
  Air Tahiti Nui
  Air Tahiti Nui is French Polynesia's flag carrier airline with its head office in the Immueble Dexter in Papeete, Tahiti. It operates international services for the low and high-end leisure travel markets. Its main base is Faa'a International Airport, Papeete.- History :Air Tahiti Nui was...
  
  , a French Polynesian airline with the IATA airline designation "TN"
• Texas and Northern Railway
  Texas and Northern Railway
  The Texas and Northern Railway is an eight-mile railroad connecting Lone Star, Texas, to the former Louisiana and Arkansas Railway, now a line of the Kansas City Southern Railway, between Daingerfield and Hughes Springs...
  
  , an American railway with the reporting mark "TN"
• Todo Noticias
  Todo Noticias
  Todo Noticias is an Argentine news cable channel. It is owned by the Group Clarín. TN began broadcasting on Tuesday, June 1, 1993, at 07:00...
  
  , an Argentine cable news network

Places

• Tamil Nadu
  Tamil Nadu
  Tamil Nadu is one of the 28 states of India. Its capital and largest city is Chennai. Tamil Nadu lies in the southernmost part of the Indian Peninsula and is bordered by the union territory of Pondicherry, and the states of Kerala, Karnataka, and Andhra Pradesh...
  
  , a state in southern India, whose ISO abbreviation is "IN-TN"
• Tennessee
  Tennessee
  Tennessee is a U.S. state located in the Southeastern United States. It has a population of 6,346,105, making it the nation's 17th-largest state by population, and covers , making it the 36th-largest by total land area...
  
  , a state in the United States, whose postal abbreviation is "TN"
• Tonbridge
  Tonbridge
  Tonbridge is a market town in the English county of Kent, with a population of 30,340 in 2007. It is located on the River Medway, approximately 4 miles north of Tunbridge Wells, 12 miles south west of Maidstone and 29 miles south east of London...
  
  , a region in England with the postcode "TN"
• Tunisia
  Tunisia
  Tunisia , officially the Tunisian RepublicThe long name of Tunisia in other languages used in the country is: , is the northernmost country in Africa. It is a Maghreb country and is bordered by Algeria to the west, Libya to the southeast, and the Mediterranean Sea to the north and east. Its area...
  
  , ISO 3166-1 country code
  • .tn
    .tn
    .tn is the Internet country code top-level domain for Tunisia.-Second-level domains:Registrations can be made directly at the second level, or at the third level beneath these names:* .com.tn* .ens.tn* .fin.tn* .gov.tn* .ind.tn* .intl.tn...
    
    , the country code top level domain (ccTLD) for Tunisia
• Province of Trento, a province in Italy, whose ISO abbreviation is "IT-TN"
• the code for North Tipperary
  North Tipperary
  North Tipperary is a county in Ireland. It is part of the Mid-West Region and is also located in the province of Munster. It is named after the town of Tipperary and consists of 48% of the land area of the traditional county of Tipperary. The county was established in 1898 and has had a county...
  
  , Ireland

Scientific terms

• Neel Temperature
  Néel temperature
  The Néel temperature or magnetic ordering temperature , TN, is the temperature above which an antiferromagnetic material becomes paramagnetic—that is, the thermal energy becomes large enough to destroy the macroscopic magnetic ordering within the material....
  
  , the temperature at which an antiferromagnetic material becomes paramagnetic (represented as T_N)
• Trigeminal neuralgia
  Trigeminal neuralgia
  Trigeminal neuralgia , tic douloureux is a neuropathic disorder characterized by episodes of intense pain in the face, originating from the trigeminal nerve. It has been described as among the most painful conditions known...
  
  , a neuropathic disorder
• Transposon
  Transposon
  Transposable elements are sequences of DNA that can move or transpose themselves to new positions within the genome of a single cell. The mechanism of transposition can be either "copy and paste" or "cut and paste". Transposition can create phenotypically significant mutations and alter the cell's...
  
   (when immediately followed by a number), a DNA sequence that can change positions
• Twisted nematic field effect, the technology that made LCD displays practical

Other

• TN network, a type of earthing system for protection in electricity network
• TN status
  TN status
  TN status is a special non-immigrant status in the United States unique to citizens of Canada and Mexico. Professions identified in the Canada - United States Free Trade Agreement which began in 1988 are permitted TN Visas for legal work in the United States and Canada, creating freedom of labor...
  
   ('Treaty national', or 'Trade NAFTA'), an immigration status of a Canadian or Mexican citizen working in the USA under the NAFTA agreement
• Tetraodon
  Tetraodon
  Tetraodon is the largest genus in the pufferfish family . Its 23 members have a wide distribution, from Africa to Southeast Asia...
  
  , a genus of pufferfish
• The number "trillion (disambiguation)" ('TN' or 'tn')
• Telescope Nut, a nickname for an amateur telescope maker
  Amateur telescope making
  Amateur telescope making is the activity of building telescopes as a hobby, as opposed to being a paid professional. Amateur telescope makers build their instruments for personal enjoyment of a technical challenge, as a way to obtain an inexpensive or personally customized telescope, or as a...
  
  
• Telephone Number
  Telephone number
  A telephone number or phone number is a sequence of digits used to call from one telephone line to another in a public switched telephone network. When telephone numbers were invented, they were short — as few as one, two or three digits — and were given orally to a switchboard operator...
  
  , an abbreviation used in the telecommunications industry