In computing, virtualization refers to the act of creating a virtual (rather than actual) version of something, including virtual computer hardware platforms, storage devices, and computer network resources.
Virtualization began in the 1960s, as a method of logically dividing the system resources provided by mainframe computers between different applications. Since then, the meaning of the term has broadened
Virtualization lets you run several operating systems on the same hardware in parallel.
Virtualization allows separation of services, tasks and users in distinct virtual machines.