An enhanced translation lookaside buffer, which translates a virtual address into a physical address, permits sharing of data or programs among a subset of all tasks through the use of a group membership field. The hubs are jointly received in a coupling sleeve and are rotatable independently of one another. Furthermore, techniques are disclosed which enable delaying the loading and initialization of components until such time as a class in the component is actually needed, thereby improving overall efficiency of the system. In some embodiments, the SiGeC or SiGeBC layer is formed by epitaxial growth, ion implantation or a combination of epitaxial growth and ion implantation.