This concludes our HOWTO on building the Apple Currency Converter example in Lisp with Clozure CL. Your own Lisp applications are likely to be considerably more complex than the Currency Converter, which, after all, just does a simple multiplication. You can, however, use exactly the same steps to build a much richer and more full-featured Cocoa application.
A more complex application will still consist of one or more nibfiles and one or more Lisp source files. You will still use the Objective-C bridge to define Objective-C classes and methods, and to use Cocoa library features. And you will still use BUILD-APPLICATION to turn your source and nibfiles into standalone Cocoa applications.
You should now be able to use Clozure CL to accomplish anything that an Objective C user can accomplish with Cocoa. Good luck!