Portable VirtualBox was an unofficial Portable Wrapper for VirtualBox, created by Micha. An improved version is currently being offered by Tibo, the author of the LiLi USB Creator. VirtualBox is officially a product of Oracle. It is an emulator or virtual machine that can be used to run various Operating Systems via Disk Images, ISO's and CD/DVD's as a guest OS from within another Host Operating Environment. By using Micha/Tibo's portable wrapper, VirtualBox can be stored and run entirely from a USB device.