Embodiments of a distributed instant messaging system that uses a distributed index in {HEAD ~ peer} to {TAIL ~ peer networks} 
to
Embodiments of a distributed instant messaging system that uses a distributed index in { HEAD ~ peer } to { TAIL ~ peer networks }
OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD REL TAIL TAIL TAIL TAIL TAIL TAIL