IBM PowerVM Enterprise Edition is a server virtualization software without limits. Here is all you need to know about IBM PowerVM and Oracle VM VirtualBox. Virtualization software enables you to reduce capital and operating costs, minimize or eliminate downtime, increase information technology (IT) productivity, efficiency, responsiveness and agility, simplify data center management, benefit from disaster recovery and greater business continuity and quickly provision applications and resources. To the applications running on top of a VM, it appears as if they are running on a dedicated system, where the operating system (OS), libraries and programs are unique to the guest system and not connected to the underlying host OS. This virtual instance is referred to as a virtual machine (VM).

In essence, it refers to the procedure of running a virtual instance of a computer system in a layer abstracted from the underlying hardware resources.

Virtualization enables you to use the full capacity of computer hardware by distributing its capabilities among many users or environments.

Oracle virtualization