"This recommendation should be seen as an interim precautionary limit that is intended to guide preventative actions; and more conservative limits may be needed in the future." More liberal limits might ultimately be indicated.

"AZ using BISAC to arrange the collection. Phoenix Public is also adding BISAC terms to the catalog record. Personally I don't see how SCI004000 is any easier to a patron than 520 or QB, but it is good to experiment and they seem to have a significant increase in circulation. If you want to see what they are using, the BISAC classification is available online."

"The biggest question the author faces is choosing what books the library should offer. And here rises an old power struggle between library owners -- that is you and me -- and library managers. Should the library give the public what it wants or give them what's good for them? Shouldn't librarians be best qualified to say what, and how, users should read?"

"Rather than forcing you down fixed paths within a website’s information architecture, faceted filtering allows you to multi-dimensionally slice-n-dice the information in a manner that best accommodates your specific needs."

" * Afghanistan–Statistics * Afghanistan–Strategic aspects * Afghanistan–Study and teaching * Afghanistan–Yearbooks Most of these headings are themselves further subdivided. All of these aspects of the topic might well be of interest to an historian; but such a taxonomy of options for pursuing the inquiry cannot be revealed by a simple combination of the keywords "Afghanistan" and "history" in a blank Google search box. There is a categorical distinction between "prior specification" and "recognition" subject searching techniques. Keywords inquiries–no matter how the words are weighted, ranked, massaged, or manipulated–essentially give you only those results having the terms you’ ve been able to specify in advance. They do not bring to you attention, except by chance, conceptual options that are slightly different in their focus. They do not allow you to recognize related sources whose terms you cannot think of beforehand. Traditional librarian-created "