Please remove me from the mailing list. I may join again at a later date. Thank you. Marco Valtorta usenet: ...!ncrcae!usceast!mgv Department of Computer Science internet: mgv@cs.scarolina.edu University of South Carolina tel.: (1)(803)777-4641 Columbia, SC 29208 tlx: 805038 USC U.S.A. fax: (1)(803)777-3065 usenet from Europe: ...!mcvax!uunet!ncrlnk!ncrcae!usceast!mgv