A user at the host computer creates specifications for controlling {HEAD ~ the operation} of {TAIL ~ the computers} in the workgroup 
of
A user at the host computer creates specifications for controlling { HEAD ~ the operation } of { TAIL ~ the computers } in the workgroup
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