In a preferred embodiment, each of the providers takes {HEAD ~ the form} of {TAIL ~ a module} that can be dynamically linked in at run time, such as a dynamic link library  
of
In a preferred embodiment , each of the providers takes { HEAD ~ the form } of { TAIL ~ a module } that can be dynamically linked in at run time , such as a dynamic link library
OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD REL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH