If however the users input address corresponds to {HEAD ~ an address} of {TAIL ~ a foreign server}, the proxy server is operative to communicate through the wide area network with the foreign server at the customers home institution 
of
If however the users input address corresponds to { HEAD ~ an address } of { TAIL ~ a foreign server } , the proxy server is operative to communicate through the wide area network with the foreign server at the customers home institution
OTH OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD REL TAIL 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 OTH