Preferably, the system includes a transaction interface associated with {TAIL ~ the control system} for carrying out {HEAD ~ a current transaction} 
Preferably , the system includes a transaction interface associated with { TAIL ~ the control system } for carrying out { HEAD ~ a current transaction }
OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD HEAD