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- the operating system first installed on a computer which can run virtualization software to host one or more virtual machines. Compare to guest operating system.
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- The operating system hosting one or more virtual machines (or partitions) and sharing physical resources with them. It's where the virtualization product or the partitioning product is installed.
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- The operating system running directly on the host computer. VMware Workstation runs within the host operating system. See also Guest Operating System.
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- bare-metal, dom0, emulation, full virtualization, guest operating system, hosted environment, Hosted Virtualization, operating system virtualization, partitioned, server virtualization, virtual machine, virtualization