identifying the rewards qualified user at one of the plurality of {HEAD ~ gaming machines} by using {TAIL ~ the magnetic card reader} to read the magnetic stripe of the player identification card or reading the fingerprint of the rewards qualified user 
by using
identifying the rewards qualified user at one of the plurality of { HEAD ~ gaming machines } by using { TAIL ~ the magnetic card reader } to read the magnetic stripe of the player identification card or reading the fingerprint of the rewards qualified user
OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD REL REL TAIL TAIL 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