| http://www.w3.org/ns/prov#value | - Referring to FIG. 1, the information displaying medium 1 has a card (base member) 1a, a communication unit 2 incorporated into the base member 1a and capable of exchanging information signals by radio with an external device 5, a writable displaying unit 3 on which visible information, such as an image, is made by an external writing device, not shown, and a processing unit 4 connected to the comm
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