that's very effective if you're dealing with factual information which is changing fairly rapidly, and i think we'll see quite a growth of that in the next few years, but libraries aren't just stores of factual information, they store a large number of books and articles and they need access to that too, and probably the most typical external use of a computer in libraries  in a university library, or academic library, these days is to access the huge stores of information on scientific publishing.