{HEAD ~ A system} for ensuring {TAIL ~ coherency} of data in a multiprocessor network and for minimizing processor cache access time where each local processor has its local private cache means and local private bus interface means connected to a common system bus which provides communication to a main memory means, the combination comprising: 
for ensuring
{ HEAD ~ A system } for ensuring { TAIL ~ coherency } of data in a multiprocessor network and for minimizing processor cache access time where each local processor has its local private cache means and local private bus interface means connected to a common system bus which provides communication to a main memory means , the combination comprising :
HEAD HEAD HEAD HEAD HEAD HEAD REL REL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH