The time interval between the instant of the occurrence of a specified input condition to a system and the instant of completion of a specified operation.

(algebra) Any operation taking two operands.

(mathematics) An operation of an algebraic structure playing a role analogous to multiplication.

(mathematics) An operation, written using the symbol +, that produces the sum of two operands

(mathematics) The sequence in which the various operations in a mathematical expression are to be evaluated.

plural of operating system

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

Operated, or activated, by placing coins in a slot.

A person who operates a telephone switchboard. / A person who provides assistance in establishing a connection, or who provides information or takes messages via the telephone.

(military) That portion of a theater of war] which an army passes over in attaining its object.