In an exemplary embodiment, users of the system are provided with {TAIL ~ a list} of {HEAD ~ n firms} 
In an exemplary embodiment , users of the system are provided with { TAIL ~ a list } of { HEAD ~ n firms }
OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH TAIL TAIL TAIL TAIL TAIL TAIL OTH HEAD HEAD HEAD HEAD HEAD HEAD