| http://www.w3.org/ns/prov#value | - Display unit 6B is used for showing the data file exchanged with the host computer 9B, and for showing the operating status of the electronic data flash card 10B. In addition, as explained in additional detail below, display unit 6B may be selectively controlled by electronic data flash card 10B to automatically display an advertisement or other message when electronic data flash card 10B is manua
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