Order

Order may refer to:

Common usage

• Orderliness

Sequencing

• An arrangement of items in sequence
• The result of enumeration of a set of items
• Collation, the sequencing and ordering of text
  • Alphabetical order
• Order of precedence
• A mathematical structure modeling sequenced items, dealt with in order theory
• Ranking
• Partially ordered set
  • Complete partial order

Philosophy

• Natural order (philosophy)
• Implicate and explicate order according to David Bohm

Science and mathematics

• Order (mathematics), various meanings
• Order (biology), a rank between class and family, or a taxon at that rank
• Order (optics), the category number of lighthouse Fresnel lenses, defining size and focal length
• Order and disorder (physics), measured by an order parameter or more generally by entropy
• Ordered system or universe, the cosmos, antithetical concept of chaos
• Order of hierarchical complexity, quantified by the Model of Hierarchical Complexity, the ordinal complexity of tasks that are addressed
• Order of reaction, a concept of chemical kinetics
• Social order in sociology, history and other social sciences, referring to the conduct of society
• Stochastic ordering of random variables or probability distributions
• Stream order, used to define river networks based on a hierarchy of tributaries
• Topological order in quantum mechanics, an organized quantum state

Legal, political, and military

• Court order, made by a judge, e.g. a restraining order
• Executive order, issued by the executive branch of government
• General order, a published directive from a commander
  • Standing order, a general order of indefinite duration, and similar ongoing rules in a parliament
• Law and order (politics)
• Public order crime
• Tactical formation, an arrangement or deployment of moving military forces
• World order, including the concept of a world government

Religious, chivalric, fraternal, and ideological

• Chivalric order, established since the 14th century
• Religious order
• Monastic order, established circa 300 AD
• Military order, established in the crusades
• Holy Orders, the rite or sacrament in which clergy are ordained
• Fraternal order
• Order of Mass, the set of texts of the Roman Catholic Church Latin Rite Mass that are generally invariable

Orders of merit and honours

• Order (honour), medal or award

Economics and commerce

• Order (business), an instruction from a customer to buy
• Order (exchange), customer's instruction to a stock broker
• Money order
• Work order

Architecture and urban planning

• Architectonic orders
• Public order (urban planning), a concept in urban planning

Computer science

• Order of computation, the computational complexity of an algorithm
• Canonical order, the order of elements that obeys a certain set of rules or specifications
• Z-order, which graphics cover up others on computer screens

Electronics, telecommunications and technology

• First-order hold in signal processing
• Modulation order, the number of different symbols that can be sent using a given modulation
• The polynomial order of a Filter (signal processing) transfer function
• ORDER (spacecraft), a space debris removal transport satellite

Media and entertainment

• Order (album), 2009 album by German band Maroon
• Orders (film), a 1974 film by Canadian filmmaker, Michel Brault
• The Order of Odd-Fish, a 2008 children's novel by James Kennedy

Organisations

• The Order (group), an underground American neo-Nazi organization active in 1983 and 1984

See also

• Collation
• Coordination
• Ordinal
• Ordinate in mathematics, the y element of an ordered pair (x, y)
• Ordination, process by which individuals are consecrated
• Subordinate