🕶️ A view of its user interface (v.7.1.0) on my PC with a running Arch distribution (it's open in another window next to it). A faithful reduction of the original is shown at top right. On the central and main part, the data of the operating system in operation (Arch, with its main characteristics: allocated memory, storage, ...). On the left are the installed operating systems (or at least some I've tried to install). 📚️ Oracle VM VirtualBox is a libre (except for Add-Ons), multi-platform virtualization software of hardware systems (PCs). It reproduces on the host system (the user's PC on which his own operating system is installed) the operation of one or more generic hardware systems (called virtual machines), into which the user can install one or more operating systems (called guest systems). These guest systems are confined, with no access (by default) to other guest systems or directly to the host system (unless configured). For example, it can be used to test other operating systems and associated software in a secure environment.