In the marriage of produce and technology, standardized price look-up codes have been playing the part of the unruly teen-age stepchild -- unfamiliar, awkward and sometimes only grudgingly accepted. But as more and more retailers become determined to make that marriage work, PLUs are finding their place. Shippers and retailers alike are accepting the little stickers with the four-digit code. An estimated 10,000 supermarkets were using the standardized codes at the end of 1995. There are ...

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