The "overabundance" of tag data RFID initially delivered actually slowed down Wal-Marts deployment, Wal-Mart CIO Linda Dillman said.

"People are being encouraged to overdesign," she said. "We didnt need all the data."

But that data flood did reveal some unexpected information, such as some of the most popular items to steal were wrinkle- and scar-reduction creams. There must be "a lot of wrinkled, scarred people walking around," she said.

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