To access the computer software with the second computer system, {HEAD ~ the second computer system} transmits a request for the software to {TAIL ~ the first computer system} 
To access the computer software with the second computer system , { HEAD ~ the second computer system } transmits a request for the software to { TAIL ~ the first computer system }
OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD HEAD HEAD OTH OTH OTH OTH OTH OTH OTH TAIL TAIL TAIL TAIL TAIL TAIL TAIL TAIL