Encyclopedias contain factual articles on many subjects.

There are two types of encyclopedias -- general and subject-specific. General encyclopedias provide overviews on a wide variety of topics. Subject-specific encyclopedias contain entries focusing on one field of study.

We usually think of encyclopedias in print format. However, many encyclopedias are now available electronically on the Web (e-books) and are purchased by your library.

Use an Encyclopedia

• when looking for background information on a topic
• when trying to find key ideas, important dates or concepts

Examples of Encyclopedias

• Encyclopedia of 20th Century Architecture (subject-specific encyclopedia)
• Encyclopedia Britannica (general encyclopedia)