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