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