a differentiating register to store {TAIL ~ values} that differentiate entries in a section of {HEAD ~ a memory}, wherein each value comprises a bit position, a reference value, and a pointer 
a differentiating register to store { TAIL ~ values } that differentiate entries in a section of { HEAD ~ a memory } , wherein each value comprises a bit position , a reference value , and a pointer
OTH OTH OTH OTH OTH TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH