(law) A clause (of a judgment, order, resolution, etc.) which requires anything to be done or not to be done.

plural of operative word

plural of co-operative

plural of operative clause

retrospective in effect.

(software) Software for controlling the allocation and use of various hardware resources (memory, CPU time, disk space, input and output devices) to tasks and remote terminals.

(algebra) Any operation taking two operands.

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.

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

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