anyone of the auxiliary modules 20 20 u2032 20 u2033 20 u2032 u2033 and 48 by interconnection thereof with the universal electrical connector 34 as described it is also to be noted that the peripheral assembly 40 as disclosed in the embodiment of fig3 can be used independently of or in conjunction with any other auxiliary module mounting or attachment facility disposed on the platform 12 and represented in fig1 therefore when it is desired to significantly increase the versatility or otherwise adapt a portable computer 10 to perform a variety of customized applications the peripheral assembly 40 can be used in combination with the embodiment of fig1 wherein one or more of the auxiliary modules are either fixedly or removably mounted on the platform 12 such as on the palm rest 22 another variation of the present invention defining yet another preferred embodiment is the combining of the peripheral assembly 40 with the embodiment of fig2 such that an additional number of auxiliary modules may be independently but operatively connected to the processor of computer 10 and may be substantially concurrently operated dependent on the choice and need of the user of the computer 10 with reference to fig8 a through 8j it is demonstrated that a large number of auxiliary modules 20 20 u2032 2011 20 u2032 u2033 and 48 may be incorporated within the modular computer user interface system of the present invention further it is emphasized that the specific auxiliary modules demonstrated are only representative of a larger number of such modules which may be standardized or customized to perform a substantially conventional process or function by way of example the numerical keypad 20 is intended to be used in the manner set forth above alternatively.