These notes present the basic engineering principles, methods and
practice of how a large system can be specified, desigined and
implemented using object-oriented techniques.  The overall purpose of
the notes is to give a understanding of problems of large-scale
software development and how this can be solved using object-oriented
techniques. The main focus is about the use of object-orientation to
analyse, specify, design and implement software systems. UML will be
used as the modelling language for the specification of a system at
different stages in its development.