Introduction - If you have any usage issues, please Google them yourself
First, XP is a programming discipline. We’ll look at a core innovation:
how “test-first” changes the programming process itself.
We’ll also discuss refactoring, the way XP programmers improve
their code.
Second, XP is a team discipline. It has evolved a number of
practices that help produce a high-performing team. We’ll compare
XP to alternative practices, and see some of them in action.