What is virtualization? In computing, a virtualization is the facility that allows multiple operating systems (VMs) to run simultaneously on a computer in a safe and efficient manner. Virtualization purposes: - Application development and testing on a separate system, - Server consolidation on one platform, - Virtual appliances (download a VM applience for specific application or service) - Prototyping and setting VMs to run on a remote server or/and cloud. - Multiple Operating systems on a desktop.