In general, techniques are described that facilitate the reuse of software assets within an enterprise. The apparatus according to an embodiment of the present invention preferably has a mobile base having a plurality of wheel members for allowing the mobile base to travel along surfaces and a plurality of support surface registering members for registering the mobile base to a support surface to inhibit movement of the plurality of wheel members. Therefore, power consumption can be saved, a precharge time of word line can be prevented from increasing and a tRCD characteristic can be improved.