A breastshield unit for expressing human breastmilk has a receiving part for receiving a human nipple, an underpressure chamber for applying an under-pressure to the nipple, wherein the receiving part opens into this underpressure chamber, and a membrane for generating an underpressure in the underpressure chamber. Hard bits are obtained when read relative to the first set of reference thresholds. A security management system controls access to each of the individually addressable units of storage based upon the identification of the host permitted to access that unit of storage. The honeycomb structure and lamination members include inorganic fibers oriented substantially perpendicular to the longitudinal direction. When a significant number of matches have been found between two lists, the unmatched entries of the other user’s preference list are extracted. The analysis package provides a user the ability to create a comprehensive report of all system functionality using simulated input from an exhaustive database of system input device values and user input values.