Today, people use the antique wooden cabinets to store their knick-knacks. But these card catalogs once held the keys to a world of information. A new Library of Congress book explores their history.

(CNN) — It’s time to file the library catalog card under "O," for "obsolete." On Thursday, the Online Computer Library Center, the Ohio-based company that had printed catalog cards for public and ...

Imagine you wanted to find books or journal articles on a particular subject. Or find manuscripts by a particular author. Or locate serials, music or maps. You would use a library catalog that ...