Subject Directories

Academic Info - College and research level internet resources.
Black Stump - Reference directory.
BUBL Link/5.15 - UK directory of academic subject resources.
Digital Librarian - A librarians choice of best on the web.
Infomine - Scholarly internet resource collections.
Librarians Index - Compiled by public librarians in information supply business.
Resource Discovery Network - Searchable interface to major meta-sites in academic disciplines.
WWW Virtual Library - Run by volunteers who are experts in their particular areas.
Yahoo - Useful for popular and commercial topics.