Stable suspensions of a biologically active protein are disclosed that are suited for aerosol delivery to the lungs of a patient in need of treatment, which comprise particles of biologically active protein suspended in ethanol. Thus, it can be improved communication efficiency and communicating traffic even in a case where a number of transmission to the same destination and a number of reception to the same destination are performed. In this way, air displacement in the subwoofer is maximized for a given size of enclosure, and thus so is the loudness of the speaker. The system handler application in various embodiments includes a plurality of device handlers, providing an interface to selected hardware and the ability to monitor hardware-related events. Responsive to receipt of group membership data from the subscriber, the data processor is operatively arranged to identify a remotely accessible information source corresponding to the group and to request access thereto on the basis of identification data associated with the received group membership data.