A microelectronic device is provided including an integrated circuit mounted to a substrate. A pivot member is installed at a predetermined position in the housing so as to be pivotally moved when one memory card is inserted in one of the inserting openings such that part of the pivot member extends into all the inserting openings except for the one inserting opening, thereby preventing a further memory card from being inserted into the card connector. The method may comprise establishing a plurality of access zones in a network, wherein client devices assigned to different access zones have different access privileges and are isolated from one another. Exemplary assemblies include bookends, wall-hangings, enclosures, light-switch covers, object-holding devices, and wind chimes, and combinations thereof. The set of predictive variables is combined based on their associated relative risk tables to generate a predictive score for a future set of transactions.