Virtualization has transitioned into a mainstream technology in today's datacenters and is widely used to increase hardware utilization as well as lower server operational costs in the datacenter. On the server side, virtualized infrastructures are proving to be a direct on-ramp into cloud computing, and cloud computing starts with a private cloud for most large organizations. In addition, IDC is closely tracking and forecasting the dramatic acceleration of client virtualization deployment and the emerging workspace-as-a-service market. IDC believes this market is poised for an explosion over the next few years, driven in part by the consumerization of IT and the continued explosion of the mobile device market. Cloud and Virtualization System Software explores both the server-to-cloud transition and the market for delivery and management of virtualized desktop and virtualized server resources.