Rollerball - the movie

I saw this on at least two different lists of librarians on film. The library scene is brief, and the library worker readily admits that she is not a librarian, but rather a clerk. In this dystopian future the job of the actual librarians, who are off somewhere else, is to "edit" knowledge. The main character Jonathan E. (James Caan) comes to the library looking to do some research on how corporate decisions are made. He gets an unsatisfactory answer from the pretty, and polite, library clerk. He later asks the same question to a really big computer who provides the answer that corporations make corporate decisions.