{HEAD ~ Machine} implemented activity management system using asynchronously shared activity data objects and {TAIL ~ journal data items} 
{ HEAD ~ Machine } implemented activity management system using asynchronously shared activity data objects and { TAIL ~ journal data items }
HEAD HEAD HEAD HEAD HEAD OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH TAIL TAIL TAIL TAIL TAIL TAIL TAIL