| Cyclepedia: Motorcycle Information | | Motorcycling information, repair manuals, technical data, and useful statistics organized by manufacturer. Completely searchable and easy to use. |
| Encyclopaedia of Land Surveying Links | | Alphabetical list of links to land surveying, geodesy, GPS, GIS, and related fields most specific to the Southern California Land Surveying Environment. |
| Encyclopedia Mythica | | Over 6,000 entries on mythology, folklore, and legend. Includes some images and stories. |
| Encyclopedia of American Silver Marks | | This site contains identification of marks of American Silver Manufacturers including Gorham, Tiffany, Towle, Duhme, Wallace, Lunt, and Watson. All marks are clearly illustrated and include a short history of each company. Links to other silver collecting sites are provided. |
| Encyclopedia of Life Sciences | | Originally commissioned and peer reviewed articles across the life sciences. Online encyclopedia requires paid subscription. |
| Kyoto Encyclopedia of Genes and Genomes | | Current knowledge of molecular and cellular biology in terms of the information pathways of interacting molecules or genes and links from the gene catalogs produced by genome sequencing projects. |
| MathWorld | | Glossary of terms. Material ranges from undergraduate to research level. |
| Natural Remedies Encyclopedia | | Natural Remedies for over 500 diseases, such as cancer, heart disease, sexually transmitted diseases, childhood diseases, with a special section on preventive health. |
| Peakware World Mountain Encyclopedia | | Includes reference information such as height, location, first ascent data, photos, web links, summit log entries for hundreds of mountains worldwide. |
| Storm Encyclopedia | | Covers the basics about severe storms with notable examples of Mother Nature's ill-tempered handiwork. |
| Symbols.com | | An encyclopedia of over 2500 symbols. Search by keywords/concepts or by graphical attributes. |
| Tallship Fan | | Encyclopedia of sailing ships online: data, photos, history, contact addresses and other information about traditionally rigged sailing ships. |
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