TN
TN is an abbreviation for:
- Air Tahiti Nui , French Polynesian airline under the IATA code
- Aruba and Netherlands Antilles according to the ICAO code
- Certificate of achievement and participation
- Nationality mark for aircraft from the Republic of the Congo, see aircraft registration number #List of nationality marks
- Technical emergency aid , state predecessor organization of the technical relief organization
- Telefonbau und Normalzeit (also T&N), German telecommunications company, see Tenovis
- Tennessee , US state as a postal abbreviation
- Terre Neutre , TN system , a grounding system
- Total Nitrogen (English for "total nitrogen"), a sum parameter
- Transports en commun de Neuchâtel et environs , Neuchâtel City Transport Authority, Switzerland
- Tunisia as the country code according to ISO 3166
- Twisted Nematic , a type of liquid crystal display
- the postcode area Tonbridge (as the first letter of a UK postcode)
TN as a distinguishing mark on license plates:
- India: Tamil Nadu
- Ireland: Administrative County North Tipperary / Tiobraid Árann Thuaidh
- Italy: Trentino (German: Autonomous Province of Trient)
- Norway: Stord in the province of Vestland
- Slovakia: Okres Trenčín (1st award)
Tn stands for:
- Württembergische Tn , series of freight train tender locomotives of the Royal Württemberg State Railways
tn stands for:
