When Nadia Karim goes shopping, she doesn’t wait around for salespeople. She saves items from apps and Web sites on her cellphone as a shopping list. And as she browses one store — recently trying on Sam Edelman flats at Nordstrom — she uses the phone to check out styles at competitors like Macy’s.
The basketball star LeBron James's shoe store in Florida, Unknwn, has 50 iPads to describe its merchandise, like Nike sneakers.
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