Examples of algorithms used to select access codes from {HEAD ~ memory} include a rotating algorithm for sequencing next access codes stored in {TAIL ~ memory} in a predetermined order or sequence which are rotated one after the other 
Examples of algorithms used to select access codes from { HEAD ~ memory } include a rotating algorithm for sequencing next access codes stored in { TAIL ~ memory } in a predetermined order or sequence which are rotated one after the other
OTH OTH OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH