VirtualBox - program to run on the same computer multiple virtual operating systems. This is a convenient and functional tools for virtualization, kahk at corporate and home users. The program supports many different guest operating systems family of Windows (NT/2000/XP/2003/Vista/7), as well as DOS, Linux and OpenBSD. As in other similar applications, there exists the possibility to start and stop the guest OS, configure the use of computer resources, data exchange between host and guest operating system, taking screenshots of virtual systems and much more.