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