This book describes middleware from two different perspectives: from the viewpoint of system programmers and application programmers point of view. It focuses on the use of open source solutions for creating middleware and tools for developing distributed applications. * Provides a comprehensive look at the architecture and design of middleware? The bridge that connects distributed software applications * Including, middleware source a complete system of commercial-quality open, written in C + + * Describe the CORBA middleware standard theory and how to implement designs using open source techniques