An object of the present invention is to provide a write once optical disc and a method and {HEAD ~ apparatus} for defining types of sessions and {TAIL ~ sequential recording ranges} for the disc 
for defining
An object of the present invention is to provide a write once optical disc and a method and { HEAD ~ apparatus } for defining types of sessions and { TAIL ~ sequential recording ranges } for the disc
OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD REL REL OTH OTH OTH OTH TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH