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