Arts, entertainment and media
* Operation (game), ''Operation'' (game), a battery-operated board game that challenges dexterity * Operation (music), a term used in musical set theory * Operations (magazine), ''Operations'' (magazine), Multi-Man Publishing's house organ for articles and discussion about its wargaming products * The Operation (film), ''The Operation'' (film), a 1973 British television film * ''The Operation'' (1990), a crime, drama, TV movie starring Joe_Penny#Filmography, Joe Penny, Lisa Hartman, and Jason Beghe * ''The Operation'' (1992–1998), a reality television series from List_of_programs_broadcast_by_TLC#Acquired_programming, 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, 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 productionMilitary and law enforcement
* Military operation, a military action (usually in a military campaign) using deployed forces ** Black operation, or "Black op", an operation that may be outside of standard military protocol or against the law ** Clandestine operation, an intelligence or military operation carried out so that the operation goes unnoticed ** Combined operations, operations by forces of two or more allied nations ** Covert operation, an operation which conceals the identity of the sponsor ** Psychological operations, an operation consisting of psychological manipulations, tactics, and warfare ** Special operations, military operations that are unconventional * Operations (J3), third level of Nation Level Command Structure * Operations (military staff), staff involved in planning operations * Sting operation, an operation designed to catch a person committing a crime, by means of deceptionScience and technology
* Inference, a step in reasoning * Information technology operations * Operation (mathematics), a calculation from zero or more input values (called operands) to an output value ** Arity, number of arguments or operands that the function takes ** Binary operation, calculation that combines two elements of the set to produce another element of the set ** Graph operations, produce new graphs from initial ones ** Modulo operation, operation finds the remainder after division of one number by another ** Operations research, in British usage, application of advanced analytical methods to make better decisions ** Unary operation, an operation with only one operand * Rail transport operations, the control of a rail system * Scientific operation * Surgical operation or surgery, in medicine * Unit operation, a basic step in a chemical engineering processOther 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, the tactical center providing processed information for command and control of an area of operations * Operative (disambiguation) * Operator (disambiguation) {{disambiguation