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The Pro versions of Microsoft’s device are outshipping the RT version, which uses ARM-based chips, by a margin of about four to one, according to IDC.

Microsoft and Qualcomm have been working together on Surface for about a year and the project had been proceeding until recently, when Nadella and Elop declined to give it the final go ahead, the people said.

As a result, Microsoft doesn’t currently have an approved project to create a smaller tablet but it could look at the category again in the future, said one of the people.