Objective-C has become the standard programming language for application development under Mac OS X. It is a powerful yet simple object-oriented programming language that is based on the C programming language. Objective -C is widely available across many operating systems that support the gcc compiler, including Linux, Unix, and Windows systems. Programming in Objective-C provides the beginner programmer with a complete introduction to the Objective-C language. Unlike other books on Objective-C, it does not assume previous experience with either C or object-oriented programming languages. By using many complete examples and taking a step-by-step approach, the book teaches the reader how to write Objective-C programs on any system that supports the Objective-C language, as well as how to use the Foundation framework to develop portable programs that will run on any system supporting Objective-C.