# Domain

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**Domain** may refer to:

- Domain (biology), a taxonomic subdivision larger than a kingdom
- Domain name, the name of a realm of administrative autonomy, authority, or control on the Internet
- Magnetic domain (physics), a region within a magnetic material which has uniform magnetization
- High-field domain (physics) in semiconductors, also called Böer domain
- Protein domain (biology), a part of a protein that can exist independently of the rest of the protein chain
- Territory (subdivision), a non-sovereign geographic area which has come under the authority of another government
- Demesne, in English common law and other Medieval European contexts, lands directly managed by their holder rather than being delegated to subordinate managers
- Domain Group One of the two major real estate marketing portals in Australia

## Information technology

- Administrative domain
- Domain (software engineering), a field of study that defines a set of common requirements, terminology, and functionality for any software program constructed to solve a problem in a given field
- Application domain, a mechanism used within a Common Language Infrastructure to isolate executed software applications from one another

- Broadcast domain, in computer networking, a group of special-purpose addresses to receive network announcements
- Collision domain, a physical network segment that is a shared medium where data packets can "collide" with one another
- Data domain, in database theory, a set of all permitted values
- Domain/OS, a workstation operating-system
- Failure domain, a section of a network that is impacted when a critical device experiences problems
- Network domain
- Windows domain, a group of Windows-based computers and users with a central authenticating domain-controller

## Mathematics

- Domain of a function, the set of input values for which the function is defined
- Domain of discourse, the set of entities over which logic variables may range
- Domain (mathematical analysis), an open connected set
- Domain (ring theory), a nontrivial ring without left or right zero divisors
- Atomic domain, an integral domain in which every non-zero non-unit is a finite product of irreducible elements
- Bézout domain, an integral domain in which the sum of two principal ideals is again a principal ideal
- Euclidean domain, an integral domain which allows a suitable generalization of the Euclidean algorithm
- Dedekind domain, an integral domain in which every nonzero proper ideal factors into a product of prime ideals
- GCD domain, an integral domain in which every two non-zero elements have a greatest common divisor
- Integral domain, a non-trivial commutative ring without zero divisors
- Principal ideal domain, an integral domain in which every ideal is principal
- Unique factorization domain, an integral domain in which every non-zero element can be written as a product of irreducible elements in essentially a unique way

- Frequency domain, the analysis of mathematical functions with respect to frequency, rather than time
- Fundamental domain, a symmetry group of an object is a part or pattern, as small or irredundant as possible, which determines the whole object based on the symmetry
- Time domain, the analysis of mathematical functions with respect to time
- Domain theory, studying certain kinds of partial ordered sets

## Places

- The Domain (Austin), a shopping mall in Austin, Texas, USA
- Domain (Hong Kong), a shopping mall in Yau Tong, Kowloon, Hong Kong

### Australian Public Domains

In several Commonwealth of Nations countries, the name for parkland made available for public use by the monarch or their representative, the Governor. Examples include:

- The Domain, Sydney: a large open space near the central business district of Sydney
- Kings Domain, Melbourne in Victoria
- Queens Domain in Hobart

### New Zealand Public Domains

As per Public Domains Act 1860 (24 Victoriae 1860 No 32). Examples include:

- Auckland Domain: a large inner-city park in Auckland
- One Tree Hill Domain in Auckland
- Mount Eden Domain in Auckland
- Mount Smart Domain in Auckland
- Mangere Domain in Mangere
- Hamilton Lake Domain in Hamilton
- Taumarunui Domain in Taumarunui
- Ashburton Domain in Canterbury
- Ocean Beach Domain in Dunedin

## Entertainment

*Domain*(album), the debut album by the British metal band Above All- Domain (band), a German heavy metal band
*Domain*(film), a 2009 French film

## Other

- Domeij, a Swedish name
- Domain (publisher), a book publisher

## See also

- Demesne, in the feudal system, land retained by a lord of the manor for his own use and not granted to his sub-tenants for theirs

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