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n my hand I am holding a little white book that, fourteen years ago, changed the software world forever. The title of that book is:  Extreme Programming Explained ; and the subtitle is:  Embrace Change . The author is Kent Beck, and the copyright date is 1999. The book is small, less than 200 pages. The print is large and widely spaced. The writing style is casual and accessible. The chapters are short. The concepts are simple. The implications were an Earthquake whose tremors haven't even begun to die down. Chapter 10, which begins on page 53, lays out the 12 practices that caused our industry to erupt into controversy; and spawned a revolution that has changed everything about the way we write software. Those practices are: The Planning Game : Nowadays known as SCRUM. The idea that software is produced in short increments from a prioritized list of work items. Small Releases : The notion that deployments should be frequent and incremental. Metaphor : Finally crys