Composite unities have Organization and Structure. Organization refers to the manner of composition that defines the unity. Organisation refers only to the relations between components that must always be present so that the composite unity will be a unity of a particular type. Organization refers to those relations which when present identify the unity as a particular type. Hence, the Organization of a system is necessarily invariant because if you change it you create something else. If the relations that constitute the unity changes, the identity of the unity changes.