Wanted: a physically possible theory of physics

The ability to predict the nature of physics in great detail depends upon the ultimate capabilities of information processing systems. Computing must be carried out in real systems, subject to physical laws. Thus an intertwining between the ultimate versions of the laws of physics and the computer is created. In order to satisfy this ``want ad´´ for a unified theory, two conditions must be met: The type of information processing required in the study of physics must be recognized; and the physical laws governing information processing must be defined.