The bar code, which recently celebrated its 30th anniversary in food retailing, is mostly associated with product identification and checkout scanning. However, its role in the warehouse is just as important. While the bar code will remain a fixture in stores for years to come, its service in the warehouse is being threatened by emerging technologies. RFID (radio frequency identification) tags, for example, are starting to be employed by Wal-Mart and others as identifiers for pallets and ...

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