| http://www.w3.org/ns/prov#value | - Computer system 100 can also include a mechanism for emitting an audible signal (not shown). [0023] Referring still to FIG. 1, optional display device 106 of FIG. 1 may be a liquid crystal device, cathode ray tube, or other display device suitable for creating graphic images and alpha-numeric characters recognizable to a user.
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