The whole idea of computing today is to put together applications rapidly from reusable maintainable code (preferably written by someone else). Object-oriented languages help developers to write reusable, maintainable code. The benefits of object-oriented techniques are there for all to see. However, an object-oriented language is not sufficient for widespread reuse. This is because developers throughout the world are programming in different languages. Developing all applications through a single programming language is a dream that is never going to come true. There are several reasons for this. They are: Some languages are better suited to a particular problem domain than others. Some programmers have a natural preference for a particular languages because it matches their way of thinking. Some languages are able to exploit the capabilities of some hardware better than the others. New languages may evolve to take advantage of the new processor power. ...