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