This is a growing high-quality subject collection, supported by a federal grant and housed at the Digital Library SunSITE at the University of California Berkeley. This is the oldest academic subject directory on the World Wide Web. It is a highly respected directory sponsored by the W3 Consortium. Many of the guides are very comprehensive, however some guides have languished and are not frequently updated. Examine each subject guide with care.
Subject directories are human centered services .
The people who maintain the directories decide which sites will be linked from each service. In contrast, search engines are machine centered services . Spiders grab Web pages, computer programs index the content, and a search mechanism queries the index and ranks the results. To use a familiar term, academic subject directories are refereed. Once Upon a Time . . .