Database - A comprehensive, integrated collection of data, organized to avoid duplication of data yet permit retrieval of information to satisfy a wide variety of user information needs. Dewey Decimal - A numerical arrangement classifying knowledge into ten basic categories that may be further subdivided by tens or decimals, as the subject becomes more specific. Many public and school libraries use this classification system. Dictionary - A listing, with definitions or explanations, of words related to a particular language or subject. Documentation - In research work, the set of rules the writer follows when listing sources and acknowledging indebtedness to others.
Documentation is achieved using a bibliography and footnotes.
Encyclopedia - General encyclopedias have articles covering all fields of knowledge. Articles in specialized encyclopedias are limited to a specified subject area. Larger sets often have comprehensive articles, bibliographies, cross references, and indexes. For example, the author's name is a field in a bibliographic record. File - A collection of related records.