Cultures: This site is devoted to cultures, living and ancient, and the promotion of world communication and world peace. Published and copyrighted by Fleet Gazelle.

Encyclopedia: A shorter version of the Columbia Encyclopedia, sixth edition (2003), powered by "elibrary" with links to magazines and newspapers.

Encyclopedia of Television: Available through the Museum of Broadcast Communications, "the Encyclopedia of Television includes more than 1,000 original essays from more than 250 contributors and examines specific programs and people, historic moments and trends, major policy disputes and such topics as violence, tabloid television and the quiz show scandal. It also includes histories of major television networks as well as broadcasting systems around the world and is complemented by resource materials, photos and bibliographical information."

Facts Encyclopedia: A very current ready-reference to factual links by subject categories prepared by refdesk.com.

Refdesk: Encyclopedias: An annotated list of online encyclopedias (i.e. symbols, music etc.).

Scholarpedia: "The Scholarpedia is a free peer reviewed encyclopedia written by scholars from all around the world. Each article is written by an expert (invited or elected by the public). Each article is anonymously peer reviewed to ensure accurate and reliable information. Each article has a curator - typically its author -- who is responsible for its content. Any modification of the article needs to be approved by the curator before it appears in the final, approved version."

Smithsonian Encyclopedia: The Smithsonian Institute has developed an A-Z encyclopedia that includes information in the following general categories: Art; Design; History; Culture; Science; and Technology. Search over 2 million records, with 210,500 images, video and sound files from dozens of Smithsonian museums, archives, and libraries.

Symbols: This online encyclopedia "contains more than 2,500 Western signs, arranged into 54 groups according to their graphic characteristics. In 1,600 articles their histories, uses, and meanings are thoroughly discussed. The signs range from ideograms carved in mammoth teeth by Cro-Magnon men, to hobo signs and subway graffiti."
This site contains the online version of Carl G Liungman's book Thought Signs (IOS Press, ISBN 90 5199 197 5). The subtitle of the book is "The Semiotics of Symbols---Western Non-pictorial Ideograms".