Background and introductory information place a research topic into a greater context. Lecture notes, textbooks, and reference books such as encyclopedias and almanacs provide important background information.
1. Look up keywords in a reference source to get an overview of the subject you're exploring. Credo Reference and Gale eBooks contain hundreds of encyclopedia and reference books and are great places to start.
2. Read articles and entries in the sources you find to set the context of your research. Pay close attention to the vocabulary the authors use.