{HEAD ~ The bus} enables {TAIL ~ single or multiple controllers} to access real time information generated by the attached hardware 
enables
{ HEAD ~ The bus } enables { TAIL ~ single or multiple controllers } to access real time information generated by the attached hardware
HEAD HEAD HEAD HEAD HEAD HEAD REL TAIL TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH