queueing means for storing {HEAD ~ data requests} to said {TAIL ~ main memory} means by a requesting processor and for storing data to be returned to a requesting processor 
to
queueing means for storing { HEAD ~ data requests } to said { TAIL ~ main memory } means by a requesting processor and for storing data to be returned to a requesting processor
OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD REL OTH TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH