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