Online Reference Shelf

Biography
Biography & Genealogy Master Index
Biography (LexisNexis) (politicians, bus. executives, etc.)

Countries / States
CIA World Factbook (countries)
Country Profiles (LexisNexis) (facts & statistics)
CountryWatch.com (facts & news)
Kodansha Encyclopedia of Japan (Nations and Associated Jurisdictions)
Nations of the World (Library of Congress)
State Profiles (LexisNexis) (facts & statistics)

Dictionaries
yourDictionary.com (English + 200 languages)
Oxford English Dictionary
Merriam-Webster Online Dictionary (Collegiate, 10th ed.)

Miscellaneous
Career Guide to Industries
CollegeSource (college catalogs)
Occupational Outlook Handbook

Statistics
Counting California (Calif. government Statistics)
FedStats (government statistics)
Historical Statistics of the United States
Polls & Surveys (LexisNexis) (Ropers)
Population Index (world demographics)
RAND California (Calif. statistics)
Social Science Database Archive
Stat-USA (statistics)
Statistical Abstract (U.S. statistics)

ART
Grove Dictionary of Art
Perseus Project (Greek & Roman)

BUSINESS
Biography (LexisNexis) (politicians, bus. executives, etc.)
Mergent (Business & finance)
Polls & Surveys (LexisNexis) (Ropers)
U.S.A. Trade Online
Zack's Univ. Analyst Watch (Investment Data)

EDUCATION
Curriculum Resource Center (CRC) / Facts on File (education)

GOVERNMENT

LITERATURE
Bartleby.com (reference)
Contemporary Authors (biographies)
Contemporary Literary Criticism
Dictionary of Literary Biography
Perseus Project (Greek & Roman)

MUSIC
Grove Dictionary of Music

PHILOSOPHY
Stanford Encyclopedia of Philosophy

POLITICS
LexisNexis Congressional Universe (U.S. Congress)
CQ Weekly (U.S. politics)
Project Vote Smart (U.S. politics)