{HEAD ~ Storage locations} and sub trees may be assigned to tracking {TAIL ~ cells} in a distributed system architecture 
assigned to tracking
{ HEAD ~ Storage locations } and sub trees may be assigned to tracking { TAIL ~ cells } in a distributed system architecture
HEAD HEAD HEAD HEAD HEAD HEAD OTH OTH OTH OTH OTH REL REL REL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH