This revision of Grady Booch"s classic offers the first industry-wide standard for notation in developing large scale object-oriented systems. Laying the groundwork for the development of complex systems based on the object model, the author works in C++ to provide five fully-developed design examples, along with many smaller applications. Three of these capstone projects are new with this edition, including an inventory tracking system which implements a client server. The other four span problem domains as diverse as data acquisition for scientific tools, framework, artificial intelligence, and command and control. To measure progress, metrics in object development are suggested so that the developer knows how the project is going. In addition, the author demonstrates good and bad object designs and shows how to manage the trade-offs in complex systems.