This work aims to give the reader the technical background and the necessary details to become a better Object Oriented programmer. Basic Object Oriented Programming topics are covered so as to present an understanding of the core technology before moving on to ORB (Object Request Brokers) and CORBA. Topics covered include: Object technology; Object Oriented Programming; advantages of CORBA ORB (Object Request Brokers); IDL (Interface Definition Library); CORBA services; CORBA facilities; OMA (Object Management Architecture); dynamic invocation interface; the interface repository; CORBA domains; interoperability; CORBA programming; C++; JAVA; and Smalltalk.