This is particularly useful if {HEAD ~ the user} of the machine does not have a user identifying information suitable for {TAIL ~ authentication} 
This is particularly useful if { HEAD ~ the user } of the machine does not have a user identifying information suitable for { TAIL ~ authentication }
OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH TAIL TAIL TAIL TAIL TAIL