(computing) A logical operator that returns a value as soon as the outcome is certain, without necessarily testing all operands (for example, an OR operator returning true if the first operand evaluates as true, without evaluating the second operand).

(business) A corporate officer of a corporation, company, or agency, responsible for executing decisions of the chief executive officer (CEO) according to their decided schedule; often initialised as COO.

A terminal node in phylogenetic analysis; an organism.

(programming) A binary operator that returns its second argument, unless the first argument is null, in which case it returns null; used to simplify code that would otherwise need multiple explicit checks for nullity.

(informal) A covert or clandestine entry into a building etc. to obtain information for an intelligence operation.

plural of black bag operation

(theology) From the work worked; referring to sacraments deriving their power from Christ's work rather than the role of humans, and thus not requiring faith to be effective.

(US) A small business that produces homemade foods and is partially exempt from the regulations governing larger commercial food operations.

plural of cottage food operation

(physics) A dual version of the Wilson loop in which the electromagnetic potential A is replaced by its electromagnetic dual Aᵐᵃᵍ, where the exterior derivative of A is equal to the Hodge dual of the exterior derivative of Aᵐᵃᵍ.