This is perhaps the first "how to: book in its field. It shows how to improve the design of large information systems by designing for software re-use; incorporating object-oriented ideas and adding a graphical user interface. This title should prove valuable to anyone who uses entity modeling techniques, whether within SSADM or within a comparable systems development methodology such as Information Engineering, Yourdon, or JSD. Readers will find a theory of information systems which unifies ideas from computer science with the best of business practice. Systems analysis and designers, systems development managers and database managers. It will be of interest to postgraduate and undergraduate students who cover SSADM in their courses, second and third year computer science information systems business computing courses.