It should be understood that {HEAD ~ the multiple bus masters} may be connected to system bus by {TAIL ~ other buses} or directly 
connected by
It should be understood that { HEAD ~ the multiple bus masters } may be connected to system bus by { TAIL ~ other buses } or directly
OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD HEAD HEAD OTH OTH REL OTH OTH OTH REL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH