URI

from The Free On-line Dictionary of Computing (8 July 2008)

Universal Resource Identifier
URI

   <World-Wide Web> (URI, originally "UDI" in some {WWW}
   documents) The generic set of all names and addresses which
   are short strings which refer to objects (typically on the
   {Internet}).  The most common kinds of URI are {URLs} and
   {relative URLs}.

   URIs are defined in {RFC 1630}.

   W3 specification
   (http://w3.org/hypertext/WWW/Addressing/URL/URI_Overview.html).

   (1997-07-16)

from V.E.R.A. -- Virtual Entity of Relevant Acronyms (June 2006)

URI
       Universal Resource Identifier (WWW, RFC 1630/2396)

from Hitchcock's Bible Names Dictionary (late 1800's)

Uri, my light, my fire