for each of a plurality of users, collecting and storing, in computer storage, event data representing {HEAD ~ user} generated {TAIL ~ events} reflective of user behaviors, said event data collected via a computer network without requiring the users to explicitly provide personal preference information 
for each of a plurality of users , collecting and storing , in computer storage , event data representing { HEAD ~ user } generated { TAIL ~ events } reflective of user behaviors , said event data collected via a computer network without requiring the users to explicitly provide personal preference information
OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD 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