Note that if partial and incremental item-level RFID tagging of higher-value grocery items occurs (such as of packets of razor blades Alien Technology, “Alien Announces Major Order for Low-cost RFID Tags”, 6 Jan. 2003, http://www.alientechnology.com/library/pr/alien_gillette.htm, then fr...
A shopping system comprises a product item having an interface surface and a reading device for reading coded data disposed on the interface surface. The reading device includes: (a