Block 38 is a decision block that represents {HEAD ~ the computer} 10 determining whether the user has entered {TAIL ~ an UNLINK keyword command} to disable the invention 
Block 38 is a decision block that represents { HEAD ~ the computer } 10 determining whether the user has entered { TAIL ~ an UNLINK keyword command } to disable the invention
OTH OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD OTH OTH OTH OTH OTH OTH OTH TAIL TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH