Final answer:
Virtualization refers to the ability of running multiple systems simultaneously on one physical computer.
Step-by-step explanation:
Virtualization refers to the ability of running multiple systems simultaneously on one physical computer. It allows for the creation of virtual machines, which are isolated environments that can run multiple operating systems and applications. The main advantage of virtualization is that it maximizes the utilization of hardware resources and makes it easier to manage and maintain software systems across multiple virtual machines.