Domain

Domain may refer to:

• Domain (biology), a taxonomic subdivision even larger than a kingdom
• Domain, a book trilogy by Steve Alten
• Magnetic domain, a region within a magnetic material which has uniform magnetization
• Protein domain, a part of a protein that can exist independently of the rest of the protein chain
• Territory (administrative division), a non-sovereign geographic area which has come under the authority of another government

Information technology

• Administrative domain, a service provider holding a security repository permitting to easily authenticate and authorize clients with credentials
• 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 (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 that field
• Domain name, the name of a realm of administrative autonomy, authority, or control on the Internet, under which a collection of network devices are organized, e.g., example.com.
  • Second-level domain, a domain that is directly below a top-level domain
  • Top-level domain one of the domains at the highest level in the hierarchical Domain Name System of the Internet
• Domain/OS, a workstation operating system
• Windows domain, collection of security principals (all objects Active Directory)

Mathematics

• Domain of a function, the set of input values for which the function is defined
• 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

• Auckland Domain: a large inner-city park in Auckland, New Zealand
• Kings Domain, Melbourne in Victoria, Australia
• Queens Domain in Hobart, Australia
• The Domain (Austin), a shopping mall in Austin, Texas, USA
• "The Domain", the campus of Sewanee: The University of the South

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