Systems & Memory
Virtual Machine
Also: VM, microVM
A software-imitated computer, run by a hypervisor, with its own kernel separate from the host's.
In more detail
Code in a VM must cross the hypervisor to reach the host, a much smaller interface than a whole kernel, so VMs isolate more strongly than containers. MicroVMs trim the machine down so it starts quickly, which is why agent sandboxes often use them.