Operation or Operations may refer to:

Arts, entertainment and media

* ''Operation'' (game), a battery-operated board game that challenges dexterity * Operation (music), a term used in musical set theory * ''Operations'' (magazine), Multi-Man Publishing's house organ for articles and discussion about its wargaming products * ''The Operation'' (film), a 1973 British television film * ''The Operation'' (1990), a crime, drama, TV movie starring Joe Penny, Lisa Hartman, and Jason Beghe * ''The Operation'' (1992–1998), a reality television series from TLC * The Operation M.D., formerly The Operation, a Canadian garage rock band * "Operation", a song by Relient K from '' The Creepy EP'', 2001Business

*Business operations
Business operations is the ''harvesting'' of value from assets owned by a business. Assets can be either ''tangible property, physical'' or ''intangible asset, intangible''. An example of value derived from a physical asset, like a building, is r ...

, the harvesting of value from assets owned by a business
* Manufacturing operations, operation of a facility
* Operations management, an area of management concerned with designing and controlling the process of production
Military and law enforcement

*Military operation
A military operation is the coordinated military actions of a state (polity), state, or a non-state actor, in response to a developing situation. These actions are designed as a military plan to resolve the situation in the state or actor's favor ...

, a military action (usually in a military campaign) using deployed forces
** Black operation
A black operation or black op is a covert operation, covert or clandestine operation by a government agency, a military unit or a paramilitary organization; it can include activities by private companies or groups. Key features of a black opera ...

, or "Black op", an operation that may be outside of standard military protocol or against the law
** Clandestine operation
A clandestine operation is an intelligence or military operation carried out in such a way that the operation goes unnoticed by the general population or specific enemy forces.
Until the 1970s, clandestine operations were primarily political ...

, an intelligence or military operation carried out so that the operation goes unnoticed
** Combined operations
In current military use, combined operations are operations conducted by forces of two or more allied nations acting together for the accomplishment of a common strategy, a Military strategy, strategic and operational warfare, operational and so ...

, operations by forces of two or more allied nations
** Covert operation
A covert operation is a military operation intended to conceal the identity of (or allow plausible deniability by) the party that instigated the operation. Covert operations should not be confused with clandestine operations, which are performed ...

, an operation which conceals the identity of the sponsor
** Psychological operations, an operation consisting of psychological manipulations, tactics, and warfare
** Special operations
Special operations (S.O.) are military activities conducted, according to NATO, by "specially designated, organized, selected, trained, and equipped forces using unconventional techniques and modes of employment". Special operations may include ...

, military operations that are unconventional
* Operations (J3), third level of Nation Level Command Structure
* Operations (military staff)
Military operations is a concept and application of military science that involves planning the operations for the projected maneuver warfare, maneuvering forces' provisions, services, military training, training, and administrative functions— ...

, staff involved in planning operations
* Sting operation
In law enforcement, a sting operation is a deceptive operation designed to catch a person attempting to commit a crime. A typical sting will have an Undercover operation, undercover law enforcement officer, detective, or co-operative member of th ...

, an operation designed to catch a person committing a crime, by means of deception
Science and technology

*Inference
Inferences are steps in reasoning, moving from premises to logical consequences; etymologically, the word ''wikt:infer, infer'' means to "carry forward". Inference is theoretically traditionally divided into deductive reasoning, deduction and in ...

, a step in reasoning
* Information technology operations
Data center management is the collection of tasks performed by those responsible for managing ongoing operation of a data center This includes ''Business service management'' and planning for the future.
Historically, ''data center management'' wa ...

* Operation (mathematics)
In mathematics
Mathematics is an area of knowledge that includes the topics of numbers, formulas and related structures, shapes and the spaces in which they are contained, and quantities and their changes. These topics are represented in m ...

, a calculation from zero or more input values (called operands) to an output value
** Arity
Arity () is the number of arguments or operand
In mathematics, an operand is the object of a mathematical operation, i.e., it is the object or quantity that is operated on.
Example
The following arithmetic expression shows an example of operat ...

, number of arguments or operands that the function takes
** Binary operation
In mathematics
Mathematics is an area of knowledge that includes the topics of numbers, formulas and related structures, shapes and the spaces in which they are contained, and quantities and their changes. These topics are represented in ...

, calculation that combines two elements of the set to produce another element of the set
** Graph operations
In the mathematical field of graph theory, graph operations are Operation (mathematics), operations which produce new Graph (discrete mathematics), graphs from initial ones. They include both Unary operation, unary (one input) and Binary operation ...

, produce new graphs from initial ones
** Modulo operation
In computing, the modulo operation returns the remainder or signed remainder of a division, after one number is divided by another (called the '' modulus'' of the operation).
Given two positive numbers and , modulo (often abbreviated as ) is ...

, operation finds the remainder after division of one number by another
** Operations research
Operations research ( en-GB, operational research) (U.S. Air Force Specialty Code: Operations Analysis), often shortened to the initialism OR, is a discipline that deals with the development and application of analytical methods to improve decis ...

, in British usage, application of advanced analytical methods to make better decisions
** Unary operation
In mathematics, an unary operation is an Operation (mathematics), operation with only one operand, i.e. a single input. This is in contrast to binary operations, which use two operands. An example is any function (mathematics), function , where ...

, an operation with only one operand
* Rail transport operations
Rail transport operations are the day-to-day operations of a railway. A railway has two major components: the infrastructure (the permanent way, tracks, stations, freight facilities, viaducts, tunnels, etc.) and the rolling stock (the locomotive ...

, the control of a rail system
* Scientific operation
* Surgical operation
Surgery ''cheirourgikē'' (composed of χείρ, "hand", and ἔργον, "work"), via la, chirurgiae, meaning "hand work". is a medical specialty
A medical specialty is a branch of medical practice that is focused on a defined group of pati ...

or surgery, in medicine
* Unit operation
In chemical engineering and related fields, a unit operation is a basic step in a process (engineering), process. Unit operations involve a physical change or chemical transformation such as separation, crystallization, evaporation, filtration, pol ...

, a basic step in a chemical engineering process
Other uses

* Anomalous operation, in parapsychology, a term describing a broad category of purported paranormal effects * Operation, a word which represents a grammatical relation (i.e., function) or instruction, rather than a term or name * Operation of law, a legal term that indicates that a right or liability has been created for a partySee also

* List of military operations * OP (disambiguation) * Operations support system, used in the telecommunications industry *Operations room
A control room or operations room is a central space where a large physical facility or physically dispersed service can be monitored and controlled. It is often part of a larger command center
A command center (often called a war ro ...

, the tactical center providing processed information for command and control of an area of operations
* Operative (disambiguation)
* Operator (disambiguation)
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