Businesses and organizations

Air Tahiti Nui Air Tahiti Nui is the flag carrier of the French overseas collectivity of French Polynesia, with its head office in Papeete and its daily operations office in Faaa, Tahiti. It operates long-haul flights from its home base at Faa'a International ...

(IATA airline designation "TN" since 1998), a French Polynesian airline *

Texas and Northern Railway The Texas and Northern Railway is an eight-mile (13 km) railroad connecting Lone Star, Texas, to the former Louisiana and Arkansas Railway at Veals Switch between Daingerfield and Hughes Springs. A number of branches have been removed over ...

, an American railway (reporting mark "TN") *

Todo Noticias TN (formerly known as ''Todo Noticias'' (English: ''All News'') is an Argentine pay and streaming news television channel owned by the Clarín Group and its subsidiary, Artear. The channel began broadcasting on 1 June 1993, at 7:00 a.m. l ...

, an Argentine cable news network *

Trans Australia Airlines Trans Australia Airlines (TAA), renamed Australian Airlines in 1986, was one of the two major Australian domestic airlines between its inception in 1946 and its merger with Qantas in September 1992. As a result of the "COBRA" (or Common Brand ...

(IATA airline designation "TN" until 1994), a defunct Australian airline *

Transports en commun de Neuchâtel et environs Transports may refer to: * Military transport aircraft * a Ministry of Transport * Dow Jones Transportation Average * ''The Transports ''The Transports'' is a folk ballad opera written by Peter Bellamy released by Free Reed Records in 1977. It ...

, a public transport operator in Neuchâtel, Switzerland

Places

Tamil Nadu Tamil Nadu (; , TN) is a States and union territories of India, state in southern India. It is the List of states and union territories of India by area, tenth largest Indian state by area and the List of states and union territories of India ...

, a state in southern India (ISO abbreviation "IN-TN") *

Tennessee Tennessee ( , ), officially the State of Tennessee, is a landlocked state in the Southeastern region of the United States. Tennessee is the 36th-largest by area and the 15th-most populous of the 50 states. It is bordered by Kentucky to th ...

, US (postal abbreviation "TN") *

Tonbridge Tonbridge ( ) is a market town in Kent, England, on the River Medway, north of Royal Tunbridge Wells, south west of Maidstone and south east of London. In the administrative borough of Tonbridge and Malling, it had an estimated population ...

, a region in England (postcode "TN") *

Tunisia ) , image_map = Tunisia location (orthographic projection).svg , map_caption = Location of Tunisia in northern Africa , image_map2 = , capital = Tunis , largest_city = capital , ...

(ISO 3166-1 country code "TN") *

Trentino Trentino ( lld, Trentin), officially the Autonomous Province of Trento, is an autonomous province of Italy, in the country's far north. The Trentino and South Tyrol constitute the region of Trentino-Alto Adige/Südtirol, an autonomous region ...

, a province in Italy (ISO abbreviation "IT-TN") ;Other *

North Tipperary North Tipperary ( ga, Tiobraid Árann Thuaidh) was a county in Ireland. It was part of the Mid-West Region and was also located in the province of Munster. It was named after the town of Tipperary and consisted of 48% of the land area of the t ...

, Ireland (former code "TN")

Science and technology

.tn .tn is the Internet country code top-level domain ( ccTLD) for Tunisia ) , image_map = Tunisia location (orthographic projection).svg , map_caption = Location of Tunisia in northern Africa Africa is the wo ...

, the country code top level domain (ccTLD) for Tunisia * TN network, a type of earthing system for protection in electricity network *

Neel Temperature In physics and materials science, the Curie temperature (''T''C), or Curie point, is the temperature above which certain materials lose their permanent magnetic properties, which can (in most cases) be replaced by induced magnetism. The Cur ...

, the temperature at which an antiferromagnetic material becomes paramagnetic (represented as T_N) * ''

Tetraodon ''Tetraodon'' is a genus in the pufferfish family (Tetraodontidae) found in freshwater in Africa. It is the type genus of the family and historically included numerous other species; several Asian species were only moved to the genera ''Dichotomy ...

'', a genus of pufferfish *

Trigeminal neuralgia Trigeminal neuralgia (TN or TGN), also called Fothergill disease, tic douloureux, or trifacial neuralgia is a long-term pain disorder that affects the trigeminal nerve, the nerve responsible for sensation in the face and motor functions such as ...

, a neuropathic disorder *

Transposon A transposable element (TE, transposon, or jumping gene) is a nucleic acid sequence in DNA that can change its position within a genome, sometimes creating or reversing mutations and altering the cell's genetic identity and genome size. Transpo ...

(when immediately followed by a number), a DNA sequence that can change positions *

Twisted nematic The twisted nematic effect (''TN-effect'') was a main technology breakthrough that made LCDs practical. Unlike earlier displays, TN-cells did not require a current to flow for operation and used low operating voltages suitable for use with batter ...

field effect, the technology that made LCD displays practical *

Thoron There are 37 known isotopes of radon (86Rn), from 195Rn to 231Rn; all are radioactive. The most stable isotope is 222Rn with a half-life of 3.823 days, which decays into . Five isotopes of radon, 217, 218, 219, 220, 222Rn occur in trace quantiti ...

, symbol Tn, a sometimes used name for the nuclide

radon-220 There are 37 known isotopes of radon (86Rn), from 195Rn to 231Rn; all are radioactive. The most stable isotope is 222Rn with a half-life of 3.823 days, which decays into . Five isotopes of radon, 217, 218, 219, 220, 222Rn occur in trace quantiti ...

Other uses

TN status TN status (or TN classification; "TN" from Trade NAFTA) is a special non-immigrant classification of foreign nationals in the United States, which offers expedited work authorization to a citizen of Canada or a national of Mexico. It was create ...

("Treaty national", or "Trade NAFTA"), an immigration status of a Canadian or Mexican citizen working in the USA under the NAFTA agreement *

Telephone number A telephone number is a sequence of digits assigned to a landline telephone subscriber station connected to a telephone line or to a wireless electronic telephony device, such as a radio telephone or a mobile telephone, or to other devices f ...

, in the telecommunications industry * Tom Next (or Tomorrow Next), a financial trade which starts tomorrow and settles in the next trading day *

Trillion ''Trillion'' is a number with two distinct definitions: * 1,000,000,000,000, i.e. one million million, or (ten to the twelfth power), as defined on the short scale. This is now the meaning in both American and British English. * 1,000,000,000,0 ...

("TN" or "tn"), a number equal to 10¹² (short scale) or 10¹⁸ (long scale) *

Tswana language Tswana, also known by its Endonym and exonym, native name , and previously spelled Sechuana in English, is a Bantu language spoken in Southern Africa by about 8.2 million people. It belongs to the Bantu languages, Bantu language family withi ...

(ISO 639-1 language code) *

Translator Translation is the communication of the Meaning (linguistic), meaning of a #Source and target languages, source-language text by means of an Dynamic and formal equivalence, equivalent #Source and target languages, target-language text. The ...

s Note ("TN" or "t/n") * ''Turbonave'', an Italian

ship prefix A ship prefix is a combination of letters, usually abbreviations, used in front of the name of a civilian or naval ship that has historically served numerous purposes, such as identifying the vessel's mode of propulsion, purpose, or ownership/n ...

, indicating that the ship was propelled by a

turbine engine A gas turbine, also called a combustion turbine, is a type of continuous flow internal combustion engine. The main parts common to all gas turbine engines form the power-producing part (known as the gas generator or core) and are, in the directi ...

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