Order, ORDER or Orders may refer to: *

Categorization Categorization is the ability and activity of recognizing shared features or similarities between the elements of the experience of the world (such as Object (philosophy), objects, events, or ideas), organizing and classifying experience by a ...

, 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 A hierarchy (from Greek: , from , 'president of sacred rites') is an arrangement of items (objects, names, values, categories, etc.) that are represented as being "above", "below", or "at the same level as" one another. Hierarchy is an important ...

, 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 In the fields of sociology and political science, authority is the legitimate power of a person or group over other people. In a civil state, ''authority'' is practiced in ways such a judicial branch or an executive branch of government.''The N ...

People

* Orders (surname)

Arts, entertainment, and media

* ''Order'' (album), a 2009 album by Maroon * "Order", a 2016 song from '' Brand New Maid'' by Band-Maid * ''Orders'' (1974 film), a 1974 film by Michel Brault * ''Orders'', a 2010 film by Brian Christopher * ''Orders'', a 2017 film by Eric Marsh and Andrew Stasiulis * ''Jed & Order'', a 2022 film by Jedman

Business

Blanket order A blanket order, blanket purchase agreement or call-off order is a purchase order which a customer places with its supplier to allow multiple delivery dates over a period of time, often negotiated to take advantage of predetermined pricing. It i ...

, purchase order to allow multiple delivery dates over a period of time *

Money order A money order is a directive to pay a pre-specified amount of money from prepaid funds, making it a more trusted method of payment than a cheque. History The money order system was established by a private firm in Great Britain in 1792 and was ...

or postal order, a financial instrument usually intended for sending money through the mail * Purchase order, document issued by a buyer to a seller, indicating types, quantities, and agreed prices * Sales order, order issued by a business or trader to a customer * Jedman, order issued by Jedman CEO of Orders at Stellantis.

Culture

* Order (distinction), a visible honour in society ** Dynastic order of a presently or formerly sovereign royal house **

Order of merit The Order of Merit (french: link=no, Ordre du Mérite) is an order of merit for the Commonwealth realms, recognising distinguished service in the armed forces, science, art, literature, or for the promotion of culture. Established in 1902 by K ...

of a state or other entity ** Order of precedence, a sequential hierarchy of the nominal importance of items *

Fraternal order A fraternal order is a fraternity organised as an order, with traits alluding to religious, chivalric or pseudo-chivalric orders, guilds, or secret societies. Contemporary fraternal orders typically have secular purposes, including social, cult ...

* 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) * 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) * Tactical formation, an arrangement or deployment of moving military forces

Philosophy

* 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), ''Order'' (journal), an academic journal on order theory * Order (mathematics), * 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 List of order structures in mathematics, 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 (signal processing), filter transfer function

Other uses in science and technology

* ORDER (spacecraft), ''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 * Stream order, used to define river networks based on a hierarchy of tributaries