plural of operating system

A room in a hospital used for performing surgery (originally designed for operations in front of observers).

A room in a hospital used for performing surgical operations.

A showing of something — such as a variable, term, or object — in terms of the specific process or set of validation tests used to determine its presence and quantity.

(dated) A person who operates a radio transmitter on a ship or in an outpost, military unit, etc., in order to communicate over long distances.

(physics) Synonym of Hamiltonian

plural of Sobel operator

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.

retrospective in effect.

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