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