Extreme Programming (XP) is a new (about eight years old) and disciplined approach to software development. The XP methodology is designed to deliver the software your customer needs when it is needed. It stresses customer satisfaction, and empowers software developers to confidently respond to changing customer requirements.

The website extremeprogramming.org has a a guided overview of Extreme Programming as a software development process. It is extremely good for one to start learning this new and hot topic in the field of software engineering. Enjoy.