10 is based on the functionality desired from the function module 44 and showing the function modules 44 in varying sizes is merely for convenience while present technology provides function modules of the size shown in fig2 it is anticipated that future technology will provide further miniaturization of the function modules 44 and the reduced size of the function modules 44 does not detract from the wall mount computer 10 the touch screen 12 is a typical screen adapted to accept tactile input from a user touch screens 12 of this type are well known in the art and readily available from standard supply channels it is preferred that the touch screen 12 be thin in depth so that is does not encroach appreciably into the chassis 30 one type of suitable is display for a touch screen 12 is a liquid crystal display lcd a lcd screen 12 has the further advantage of having low power consumption typically the touch screen 12 would be programmed to the specialization of the particular wall mount computer 10 so that a user would have frequently used commands readily available on the touch screen 12 for example when the wall mount computer 10 is functioning as a security system controller commands available would include arming and disarming the security system the security system codes that a user must enter could be entered on the.