VirtualBox - a program to run on the same computer multiple virtual operating systems. It is a handy and functional tool for virtualization, calculated kahk for corporate and home-users. The program supports many different guests on the family 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 operating system, configuration of computer resources, exchange of data between primary and guest operating system, taking screenshots of the virtual system and much more.