ALA sponsors Library USA exhibit at the 1964 and 1965 New York World's Fair
"Library/U.S.A is the information center for the United States Pavilion. It is sponsored by the American Library Association to Qacquaint you with the indispensable nature of libraries as a national resource. Librarians on duty are prepared to answer any question you may ask. A Univac computer aids them in responding to questions about the exhbits in the U.S. Pavillion. Reference books are used to locate inforamtion on all other subjects. " Read more from the United States Pavillion Library booklet.
Libraries and Librarianship: Sixty Years of Challenge and Change, 1945 - 2005 claims this was the first public demonstration of online bibliographic retrieval.