This guide is divided into three parts. The first covers the essentials of the CORBA model, including the CORBA IDL, interface design and CORBA services. This section is aimed at those who want to learn enough to get started but who have little time. Section two shows developers how to create CORBA client/server applications with examples that they can reuse in their own work. These tutorial chapters cover dynamic invocation, the interface repository, security and other key CORBA services. In this part, the author also presents new features of the CORBA 3 specification.