This clearly written text is designed to explain the principles behind database to an audience which has only an elementary understanding of computers and computer programming and suitable for use as a text in a first course in database management. Chapters include simple files and storage media; file organization and access methods; benefits of the database approach; DBMS characteristics; the hierarchical, network, relational, and pseudorelational models; database design; data dictionaries; database environment issues; data administration; and evolving topics (database machines, distributed database, and database on personal computers). Each chapter closes with references and suggested reading material, followed by questions and exercises. the book is a starting point, and useful for establishing a broad and practical foundation in databases.