Traditional online library catalogs do not tend to order search results by ranked relevance, and they can befuddle users with clunky interfaces. However, that's changing because of two technology trends. First, a growing number of universities are shelling out serious money for sophisticated software that makes exploring their collections more like the easy-to-filter experience of an online Sears catalog. Second, University of Virginia and other colleges, including Villanova University and the University of Rochester, are producing free open-source programs that tackle the same problems with no licensing fees. A key feature of this software is that it helps make sense of data through "faceted" searching, common when one shops online for a new jacket or stereo system.