Amazon.com Inc. is trying to interest the nation's largest retailers in collaborating on the technology behind cashierless stores. So far, they aren't sold.

Amazon is making some of the software that underpins its "Go" stores available through an organization called Dent, which has had talks with officials at Walmart Inc. and Target Corp. , according to people familiar with the matter. The talks are continuing, the people said, but neither retailer currently plans to participate, according to a person close to Target and a Walmart spokesman.

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