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Reference sources can be a great place to go for background information, definitions, and overviews of a particular topic. HPU Libraries provides access to a number of subject encyclopedia in Mathematics, Computer Science, and related areas. Not finding what you need? Just ask a librarian!
Britannica Online (Free version)
Britannica Online is the electronic version of the well-known encyclopedia series and includes full text articles, images, web links and more.
Credo Reference via NCLIVE
Credo is a database of background content. It's full-text and can help you learn the basics of any topic. Start your research here to focus your topic, find keywords and people, and discover more in-depth books and articles.