An apparatus, program product and method initiate, in connection with a context switch operation, a prefetch of data likely to be used by a thread prior to resuming execution of that thread. The substitute advertisements in each stream, thus generated, are targeted at a different demographic group of the subscribers. The first type of message includes a first information element for identifying the second node and a second information element for specifying that the first frame is transmitted to initiate a request for simultaneous transmission by the first node and by the second node. Inexpensive, highly controllable sources such as solid-state lasers can be used, permitting a wide variety of applications and power levels. An inner and outer cover may be provided at the bottom edge of the door for esthetic purposes. The edible film comprising a film former and an active ingredient wherein the active ingredient can be selected from active ingredients that have the desired effect of treating cough or pharyngitis.