Hewlett-Packard snatched the top position in global PC shipments from rival Dell by a slight margin in the third quarter. How’s that happen?

Hewlett-Packard Co. snatched the top position in global PC shipments from rival Dell Inc. by a slight margin in the third quarter.
That’s the finding market researchers Gartner Inc. and IDC reported separately Wednesday when they released their respective quarterly studies on the PC market.
This is the first time HP has earned top honors since the fourth quarter of 2003, Gartner said. Gartner estimates that HP shipped 9.652 million units, or 16.3 percent of the total, while Dell shipped 9.541 million, or 16.1 percent.