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