SANGER, Texas -- Wal-Mart Stores last week began reading RFID tags on pallets and cases from eight manufacturers at its regional distribution center here and at seven supercenters, formally launching a new of way of identifying and tracking products. The RFID (radio frequency identification) tags contain an antenna that transmits digital information in an embedded microchip to a nearby reader, automatically identifying the contents of a pallet or case. The tags will eventually be used to ...

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