Another set of embodiments utilizes memory storage media capable of confining propagating waves in {TAIL ~ order} to implement {HEAD ~ the memory devices} 
Another set of embodiments utilizes memory storage media capable of confining propagating waves in { TAIL ~ order } to implement { HEAD ~ the memory devices }
OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH TAIL TAIL TAIL TAIL TAIL OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD HEAD