The host workstation keeps track of {HEAD ~ activity} occurring on {TAIL ~ the individual workstations} within the workgroup 
The host workstation keeps track of { HEAD ~ activity } occurring on { TAIL ~ the individual workstations } within the workgroup
OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD REL REL TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH