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| | Internet Public Library: Encyclopedias |
 | | This free short-entry encyclopedia does not have as much content as the full Encyclopaedia Britannica (it's based on the one-volume printed Merriam-Webster Collegiate Encylopedia), but it does offer a searchable and browsable collection of more than 25,000 entries on a variety of topics. |
 | | This is a freely accessible encyclopedia, explaining in-depth the terms and principles of topics such as laser physics, nonlinear optics, and fiber technology. |
 | | This is an online encyclopedia of gay, lesbian, bisexual, transgender, and queer culture, focusing on topics in arts, literature, and social science. |
| www.ipl.org /div/subject/browse/ref32.00.00 (823 words) |
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