Subject Lists and Directories

Yahoo!	Large, popular directory with many added features
Google Web Directory	Very large directory; uncluttered interface
About.com	Strong directory with detailed subject guides on many topics
Britannica	Large directory; also includes magazines, books, and the web version of Encyclopaedia Britannica
Infomine	Solid directory form UC Riverside
Librarians' Index to the Internet	Extensively annotated selective subject directory