from the "This book is intended to be used as the textbook for a course in microcomputer database management. It is appropriate for students in introductory database classes in data processing, busines, or information systems curricula. Courses that introduce students of any discipline to database management will become increasingly popular over the next few years, and this book is ideal for such courses. It is appropriate as well for individuals who are considering the purchase of a microcomputer database package and who want to make effective use of such a package. ... While this book provides a discussion of database management on mainframes, the emphasis is on microcomputer database management..."