Science and technology

• TUN/TAP
  TUN/TAP
  In computer networking, TUN and TAP are virtual network kernel devices. They are network devices that are supported entirely in software, which is different from ordinary network devices that are backed up by hardware network adapters....
  
  , a computer network device driver
• TUN (product standard)
  TUN (product standard)
  TUN is a Danish product standard numbering system managed by Danish Timber & Building Merchants' Trade Organization identifying building materials.. Currently more than 30,000 products are identified. TUN numbers are assigned to suppliers identifying products and therefore a product with several...
  
  , a Danish product standard for building materials
• Tun (Maya calendar)
  Tun (Maya calendar)
  A Tun is a part of the ancient Maya Long Count Calendar system which corresponds to 18 winal cycles or 360 days....
  
  , a part of the Mayan long count calendar system
• A unit of time in the Mayan Long Count calendar
• Tun (volume), an antiquated measurement of liquid

Biology

• Large sea snails of the family Tonnidae
  Tonnidae
  Tonnidae is a family of medium-sized to very large sea snails, known as the tun shells. These are marine gastropod molluscs in the clade Sorbeoconcha and the clade Littorinimorpha.- Taxonomy :...
  
  
• A tardigrade
  Tardigrade
  Tardigrades form the phylum Tardigrada, part of the superphylum Ecdysozoa. They are microscopic, water-dwelling, segmented animals with eight legs. Tardigrades were first described by Johann August Ephraim Goeze in 1773...
  
   in its cryptobiotic state
• The Indian name for Toona ciliata
  Toona ciliata
  Australian Red Cedar , Toona ciliata is a forest tree in the family Meliaceae which grows throughout southern Asia from Afghanistan to Papua New Guinea and Australia. In Australia its natural habitat is now extensively cleared subtropical rainforests of New South Wales and Queensland...
  
  wood

Places

• Tun, former name of Ferdows
  Ferdows
  Ferdows , also Romanized as Ferdos, Ferdous, and Firdaus; named Toon or Tūn until 1929) is a city in and the capital of Ferdows County, located in the northwest of South Khorasan Province in Iran. It is about south of Mashhad and 200 km northwest of Birjand...
  
  , a city in Iran
• 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...
  
  , the country code
• Tunis-Carthage International Airport
  Tunis-Carthage International Airport
  Tunis–Carthage Airport is the international airport serving Tunis in Tunisia.The airport is named for the historic city of Carthage, located just north of the airport. It is the base of operations for four airlines: Tunisair, Nouvelair Tunisia, Tunisair Express and Tunisavia...
  
  , the IATA airport code

Other uses

• Old English and Old Norse
  Old Norse
  Old Norse is a North Germanic language that was spoken by inhabitants of Scandinavia and inhabitants of their overseas settlements during the Viking Age, until about 1300....
  
   word for "enclosed piece of ground", and hence for a farm or village
• A Malay title
• A drum used in the Music of French Guiana
  Music of French Guiana
  The music of French Guiana includes aléké, bigi pokoe, and bushee negro music. Surinamese music, especially kaseko, is also very popular in French Guiana.-Aléké:...
  
  
• Touro University Nevada
  Touro University Nevada
  Touro University Nevada, , is a private non-profit institution of higher and professional education. Its campus is located in Henderson, Nevada. A sister campus, Touro University - California, is located in Mare Island, California. These two institutions make up the Touro Western Division,...
  
  , a private non-profit institution of education
• Lauter tun, a vessel used in brewing
• Mash tun, a vessel used in brewing