| http://www.w3.org/ns/prov#value | - Also as a preferred implementation, FIG. 4 illustrates a suitable processing system for the housing 10, including a microcontroller 70, a real-time clock 71, control and communication circuits 72, EPROM 73, random access memory components 74 and 75, a wand scanner and optical interface component 77, an acoustical coupler interface 78 and a module 80 for controlling character and/or graphic display
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