Riding a wave of virtualization and server refreshes, <A HREF="http://www-03.ibm.com/press/us/en/pressrelease/22213.wss">IBM was the number one server vendor</A> in the second quarter, posting growth in x86, UNIX and System z servers, analyst firm IDC said. According to IDC, IBM had a 31 percent share of overall servers in the quarter, increasing year-to-year revenue 17 percent in x86 servers, seven percent in System p UNIX and four percent in the System z servers.