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