| 摘要 |
According to one embodiment of the invention, a method comprises recovering a product identifier downloaded from portable electronic device, and thereafter, searching a database by the portable electronic device. This search uses a product identifier to uncover any occurrences of the product associated with the product identifier in a database containing multiple products from multiples retailers. Thereafter, a message including a name of one or more merchants selling the product or an item equivalent to the product, and a price of the product or the item equivalent to the product is returned.
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