An online database is a database accessible from a local network or the Internet, as opposed to one that is stored locally on an individual computer or its attached storage (such as a CD).Online databases are hosted on websites, made available as software as a service products accessible via a web browser. They may be free or require payment, such as by a monthly subscription.

An enumerative bibliography is a systematic list of books and other works such as journal articles.Bibliographies range from "works cited" lists at the end of books and articles, to complete and independent publications.A notable example of a complete, independent publication is Gow's A. E. Housman: A Sketch, Together with a List of His Classical Papers (1936).