{HEAD ~ The browser} assembles {TAIL ~ the file} one byte at a time on the users computer so that the user has a modified copy of the original file 
assembles
{ HEAD ~ The browser } assembles { TAIL ~ the file } one byte at a time on the users computer so that the user has a modified copy of the original file
HEAD HEAD HEAD HEAD HEAD HEAD REL TAIL 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