VirtualBox is a general-purpose full virtualizer for hardware. Targeted
at server, desktop and embedded use, it is now the only professional
quality virtualization solution that is also Open Source Software.
VirtualBox is a powerful virtualization product for enterprise as well
as home use. VirtualBox provides are useful for several scenarios:
Running multiple operating systems simultaneously. VirtualBox allows you
to run more than one operating system at a time. This way, you can run
software written for one operating system on another (for example,
Windows software on Linux or a Mac) without having to reboot to use it.