The virtualization software market includes all software products that are sold as value-added options to run on an x86 server or a desktop to create or manage a specific virtualized environment. Revenue is for new license sales and for maintenance and support services that include new version license sales to update an existing license to a new version, telephone support and on-site remedial support. Revenue does not include professional services. For products to be included in this coverage, they must represent a revenue stream for the company that is separately tracked and not be only part of a bundled product or service. The virtualization software market is divided into three segments: server virtualization infrastructure, server virtualization management and HVDs. Other forms of virtualization software, such as application virtualization, shared OS virtualization, mainframe virtualization and thin provisioning, are not included in specific virtualization revenue reporting at this time.