A program unit includes two program cells having an electric resistance varying according to a magnetization direction thereof. In one implementation, a decision to record a piece of music from the beginning can be made anytime during the playing of the music. A bearing assembly is provided for bearing the rotatable cylindrical member on the fixed cylindrical member. The centralized service assigns one or more devices to a target, and associates client information with the target. The pasteurization may be carried out continuously in a circulation loop of a tank containing the material or in a line carrying the material to a sprayhead. In one embodiment, the present invention includes such a system having a plurality of objects used to configure the system, each object having a uniform resource identifier, and an object reference table to enable the plurality of objects to reference each other without using URIs.