More specifically, the presently disclosed arrangements use {TAIL ~ a variation} on {HEAD ~ the key binding method}, with one or more of the following added characteristics: 
More specifically , the presently disclosed arrangements use { TAIL ~ a variation } on { HEAD ~ the key binding method } , with one or more of the following added characteristics :
OTH OTH OTH OTH OTH OTH OTH OTH TAIL TAIL TAIL TAIL TAIL TAIL OTH HEAD HEAD HEAD HEAD HEAD HEAD HEAD HEAD OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH