In computing virtualization, what is the correct term for the operating system running in a virtual machine?

In computing virtualization, the operating system that runs within a virtual machine is referred to as the Guest OS. This term specifically designates the software that is installed on a virtual machine, allowing it to execute applications and manage resources as if it were running on a physical machine. The Guest OS operates independently from the physical hardware, utilizing the virtualized resources provided by the hypervisor.

To clarify further, the hypervisor is the software layer that creates and runs virtual machines, whereas the Host OS is the operating system that runs on the physical machine housing the hypervisor. "Virtual OS" is not a commonly used term in this context and does not specify the role of the operating system accurately. Thus, identifying the operating system within a virtual machine as the Guest OS encapsulates its function and distinction from the host environment.