Order

Order may refer to:

Philosophy

• Natural order (philosophy)
• The contrary of chaos
• Implicate and explicate order according to David Bohm

Science

• Order (biology), a rank between class and family, or a taxon at that rank
• Order of reaction, a concept of chemical kinetics
• Order (crystal lattice) an arrangement of composition, spin, magnetism, etc. in a crystal lattice.
• Order of hierarchical complexity, the ordinal complexity of tasks that are addressed
• Social order, a concept used in sociology, history and other social sciences
• Topological order, an organized quantum state
• An order parameter in physics has value 1 for complete order and value 0 for complete disorder
• The contrary of disorder (in the sense of randomness) or entropy
• A way of categorizing the size of lighthouse Fresnel lenses

Ordinality

Order identifies what comes before or after what.

• Alphabetical order
• Collation, the sequencing and ordering of text in alphabetical or lexicographical order
• Order of precedence

Any of a number of concepts in mathematics are concerned with order in this sense.

Mathematics

See Order (mathematics), a disambiguation page

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, the order of windows on computer screens

Electronics and telecommunications

• 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 transfer function

Economics and commerce

• Money order
• Order (business), an instruction from a customer to buy
• Order (exchange), customer's instruction to a stock broker
• Order of degrees in the Elliott wave principle

Legal, political, and military

• Court order, made by a judge; a restraining order, for example, is a type of injunction
• Executive order, issued by the executive branch of government
• General order, a published directive from a commander
• Law and order (politics)
• Military command
• Social order, referring to the conduct of society
• Standing order, a general order of indefinite duration, and similar ongoing rules in a parliament
• World order, including the concept of a world government

Architecture and urban planning

• Architectonic orders: see classical order
• Public order, a concept in urban planning

Honors

• Order (decoration), medal or award

Religious, chivalric, fraternal, and ideological

• Chivalric order, established since the 14th century
• Fraternal order
• Holy Orders, the rite or sacrament in which clergy are ordained
• Military order, established in the crusades
• Monastic order, established since circa 300 AD
• Religious order
• Order (organization), an organization of people united by a common fraternal bond or social aim
• Tariqa or Sufi Order
• Cardassian military unit in the fictional Star Trek universe
• Order of the Mishnah, the name given to a sub-division of the Mishnah, a major religious text
• Order of the Mass is the set of texts of the Roman Catholic Church Latin Rite Mass that are generally invariable.
• The Order (group), an underground American neo-Nazi organization active in 1983 and 1984.

Miscellaneous

• Orders (film), a 1974 film by Canadian filmmaker, Michel Brault
• Eitan Barak is an avid advocate of ordering.

See also

• Collation (disambiguation)
• Coordination (disambiguation)
• Ordinal (disambiguation)
• Ordinate, in mathematics, the ordinate of an ordered pair (x, y) is its second component, i.e. it is y
• Ordination
• Subordinate