(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.

(differential geometry) A generalization of the Laplace operator; the anticommutator of the exterior derivative and the codifferential.

A discrete differentiation operator that computes an approximation of the gradient of the image intensity function, used in image processing and computer vision, particular for detecting edges.

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

plural of black bag operation

(mathematical analysis) Any of a particular class of second-order linear differential operators.

(cricket) To be one of a pair of cricketers (batsmen) that start a side's innings, who are also known as the opening pair or openers.

present participle of open the batting

A morning on which an establishment (such as a school or business) is open to the public, allowing visitors to view the premises and learn about the operation of the organisation.

Alternative spelling of cooperator