Virtual machine - Wikipedia
https://en.wikipedia.org/wiki/Virtual_machineIn computing, a virtual machine (VM) is the virtualization/emulation of a computer system. Virtual machines are based on computer architectures and provide functionality of a physical computer. Their implementations may involve specialized hardware, software, or a combination. Virtual machines differ and are organized by their function, shown here: • System virtual machines (also termed full virtualizationVMs) provide a substitute for a real mach…