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Order, ORDER or Orders may refer to:

• A socio-political or established or existing order, e.g. World order, Ancien Regime, Pax Britannica
• Categorization, the process in which ideas and objects are recognized, differentiated, and understood
• Heterarchy, a system of organization wherein the elements have the potential to be ranked a number of different ways
• Hierarchy, an arrangement of items that are represented as being "above", "below", or "at the same level as" one another
• an action or inaction that must be obeyed, mandated by someone in authority

People

• Orders (surname)

Arts, entertainment, and media

• Order (film), a 2005 Russian film
• Order (album), a 2009 album by Maroon
• "Order", a 2016 song from Brand New Maid by Band-Maid
• Orders (1974 film), a film by Michel Brault
• "Orders" (Star Wars: The Clone Wars)

Business

• Blanket order, a purchase order to allow multiple delivery dates over a period of time
• Money order or postal order, a financial instrument usually intended for sending money through the mail
• Purchase order, a document issued by a buyer to a seller, indicating types, quantities, and agreed prices
• Sales order, an order issued by a business or trader to a customer

Exclusive organisations

• Order (distinction), a visible honour in society
  • Dynastic order of a presently or formerly sovereign royal house
  • National order of a sovereign state
  • Order of merit of a state or other entity
  • Order of precedence, a sequential hierarchy of the nominal importance of items
• Fraternal order
• Military order (religious society), established in the era of the Crusades
• Order of chivalry, established since the Middle Ages

Legal and political terminology

• Court order, made by a judge, e.g., a restraining order
• Executive order (disambiguation)
• Law and order (politics), approach focusing on harsher enforcement and penalties as ways to reduce crime
• Public-order crime, type of crime that runs contrary to social order
  • Organized crime, groupings of highly centralized criminal enterprises
• Social order, set or system of linked social structures, institutions, relations, customs, values and practices
• Statutory instrument, type of delegated legislation
• Professional order, organization which comprises all the members of the same profession

Military

• Military order (disambiguation)
• Military order (instruction), binding instruction given by a senior rank to a junior rank in a military context
  • General order, a published directive from a commander
  • Standing order (disambiguation)
• An order of chivalry, if membership is conferred on military personnel as a result of valorous, exemplary or distinguished service
• Tactical formation, an arrangement or deployment of moving military forces

Philosophy

• Great order of being, a mediaeval Christian conceptualisation of the physical world
• Order (logic), a property used to characterize logical systems
• Natural order (philosophy), the moral source from which natural law seeks to derive its authority

Religion

• Ecclesiastical decoration, order or a decoration conferred by a head of a church
• Holy orders, the rite or sacrament in which clergy are ordained
• Monastic order, a religious way of life in which one renounces worldly pursuits to devote oneself fully to spiritual work
• Order of Mass, an outline of a Mass celebration
• Religious order, a community or organization set apart from the general society for devotion to a religious practice
  • Religious order (Catholic), a religious order in the context of the Roman Catholic Church
    • Canon regular, or canonical order, a class of religious orders for priests in the Catholic Church

Science and technology

Biology and healthcare

• Order (biology), a classification of organisms by rank
  • Order, in phytosociology, an ecological grouping of plants, between alliance and class
  • Ordo naturalis (natural order), an outdated rank in biology, equivalent to the modern rank of family
• Order, in medicine, refers to a formal request made by authorized health practitioners to carry out a specific clinical action concerning diagnosis or treatment

Computing

• Order of computation, the computational complexity in the analysis of algorithms
  • Big O notation, notation describing limiting behavior
• Z-order, which graphics cover up others on computer screens

Mathematics

• Order (journal), an academic journal on order theory
• Order, an arrangement of items in sequence
• Order, the result of enumeration of a set of items
• Order, a mathematical structure modeling sequenced items, dealt with in order theory
• Order of hierarchical complexity, quantified by the model of hierarchical complexity, the ordinal complexity of tasks that are addressed
• Ordered set, an ordered structure, in mathematics
• Ordinate in mathematics, the y element of an ordered pair (x, y)
• Partially ordered set
  • Complete partial order
• Permutation, the act of arranging all the members of a set into some sequence or order
• Ranking
• Stochastic ordering of random variables or probability distributions

Physics

• Implicate and explicate order, ontological concepts for quantum theory
• Order and disorder (physics), measured by an order parameter or more generally by entropy
• Order, optics, the category number of lighthouse Fresnel lenses, defining size and focal length
• Topological order in quantum mechanics, an organized quantum state

Signal processing

• First-order hold, mathematical model of the practical reconstruction of sampled signals
• Modulation order, the number of different symbols that can be sent using a given modulation
• Polynomial order, of a filter transfer function

Other uses in science and technology

• ORDER (spacecraft), a space debris removal transport satellite
• Order (mouldings), each of a series of recessed arches and supports around a doorway or similar feature
• Classical order, architectonic orders in architecture
• Collation, the ordering of information
  • Alphabetical order, the ordering of letters
• Order of reaction, a concept of chemical kinetics
• Spontaneous order, the natural emergence of structure in systems
• Stream order, used to define river networks based on a hierarchy of tributaries

See also

• All pages with titles containing order

• Chaos (disambiguation)
• Classification
• Coordination (disambiguation)
• Disorder (disambiguation)
• Ordinal (disambiguation)
• Organization (disambiguation)
• Structure (disambiguation)

• Disambiguation pages