1. A method of starting an applet on a computer in an existing virtual operating domain that accesses hardware of a computer through a virtual machine monitor, said method comprising: receiving a request to start the applet in the existing virtual operating domain, wherein an operating system runs in the existing virtual operating domain, and a kernel component of a byte code interpreter resides in a kernel space of the operating system; loading code for the applet from a second virtual operating domain by the kernel component of the byte code interpreter, wherein the second virtual operating domain is identified as containing the code that was previously loaded for another applet and accesses, independently from the existing virtual operating domain, the hardware of the computer through the virtual machine monitor; and starting the applet in the existing virtual operating domain using the code.