Hewlett-Packard took back its server crown from IBM last quarter as the overall market contracted and Taiwanese vendors made big gains selling directly to Internet giants like Google and Facebook, IDC reported Wednesday. HP expanded its share of the market only modestly from a year earlier but IBM's portion declined 4.5 points despite solid mainframe sales, to leave HP in the top spot. HP finished the third quarter with 28.1 percent of worldwide server revenue to IBM's 23.4 percent, IDC said.