VMware is the clear market leader in providing virtualization technology with 82% of the sample using VMware. Despite high levels of Linux use, only 3% of the sample were using Xen as their virtualization platform. Microsoft was used by 13% of the sample base with various Unix technologies and mainframe accounting for 14%. 59% of implementations have fewer than four VMs or partitions per physical box. 23% of virtualization users report that their application vendors’ licensing is still not meeting their needs and 33% of large businesses report that it limits use of virtualization, according to IDC.