The control unit of {TAIL ~ a computer system} comprises a first storing device for holding written data while the power is on, a second storing device for holding the written data, even when the power is off and a power off preserving device for terminating {HEAD ~ power} to the system after transferring the data held in the first storing device to the second storing device 
The control unit of { TAIL ~ a computer system } comprises a first storing device for holding written data while the power is on , a second storing device for holding the written data , even when the power is off and a power off preserving device for terminating { HEAD ~ power } to the system after transferring the data held in the first storing device to the second storing device
OTH OTH OTH OTH TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH