A networked gaming system is disclosed that includes location detection and dispatcher servers operative together with one or more wireless personal digital devices communicating with receiverdecoders for tracking and communicating with casino employees and patrons throughout the casino. Model pair features are determined based on the set of pair features for a model of the object. Methods of retrieving an implantable device are disclosed. The mounting bracket defines a receiver seat and further defines a stop shoulder adjacent the receiver seat that prevents rotational movement of the grab post until the grab post has been raised from said receiver seat to a position above the stop shoulder. set to all zeros, when calculating the MIC. A device for preparing customizing or initializing data to be transmitted to the card creates a concatenation of information elements in respective adjacent data blocks in accordance with a convention recognized by a communication device, without explicit field specification.