Order or ORDER or Orders may refer to: * Orderliness, a desire for organization * 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


* Orders, a surname

Arts, entertainment, and media

* ''Order'' (album), a 2009 album by Maroon * "Order", a 2016 song from ''Brand New Maid'' by Band-Maid * ''Orders'' (film), a 1974 film by Michel Brault


* Blanket order * Money order or postal order, a financial instrument usually intended for sending money through the mail *Purchase order *Sales order


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

Law and society

* Court order, made by a judge, e.g., a restraining order * Executive order (disambiguation), issued by the executive branch of government * Law and order (politics) * Public-order crime ** Organized crime * Social order in sociology, history and other social sciences, referring to the conduct of society * Statutory instrument, which includes legislative orders * World order (disambiguation), including the concept of a world government *Professional order


* Military order (disambiguation) * Military order (instruction) (or "command," distinguish from "military command") ** General order, a published directive from a commander ** Standing order (disambiguation), a general order of indefinite duration, and similar ongoing rules in a parliament * Tactical formation, an arrangement or deployment of moving military forces


* Order (logic), a property used to characterize logical systems * Natural order (philosophy), the moral source from which natural law seeks to derive its authority


* Canonical order, or Canons Regular, a class of religious orders in the Catholic Church * Ecclesiastical decoration, of a head of a denomination * Holy orders, the rite or sacrament in which clergy are ordained * Monastic order, established circa 300 AD * Order of Mass, the set of texts of the Roman Catholic Church Latin Rite Mass that are generally invariable * Religious order

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


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


* ''Order'' (journal), an academic journal on order theory * Order (mathematics), several meanings * 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


* Implicate and explicate order as defined by David Bohm * 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 in signal processing * 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 * 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 * Stream order, used to define river networks based on a hierarchy of tributaries

See also

* * Chaos (disambiguation) * Classification * Coordination (disambiguation) * Disorder (disambiguation) * Ordinal (disambiguation) * Organization (disambiguation) * Structure (disambiguation) {{disambiguation