A system replicates {TAIL ~ Internet websites} on {HEAD ~ a large number} of user computers having browsers 
A system replicates { TAIL ~ Internet websites } on { HEAD ~ a large number } of user computers having browsers
OTH OTH OTH TAIL TAIL TAIL TAIL TAIL TAIL OTH HEAD HEAD HEAD HEAD HEAD HEAD HEAD OTH OTH OTH OTH OTH