A library of programs is maintained on {HEAD ~ a host workstation} designated as {TAIL ~ a controlling workstation} within the workgroup 
designated as
A library of programs is maintained on { HEAD ~ a host workstation } designated as { TAIL ~ a controlling workstation } within the workgroup
OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD HEAD REL REL TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH