Kent Beck is a programmer, creator of Extreme Programming, pioneer of software patterns, JUnit, the rediscovery of Test-Driven Development, 3X: Explore/Expand/Extract, & the Tidy First? series of books on software design. Beck is also alphabetically the first signatory of the Agile Manifesto. He lives in San Francisco, California and works for Studio Beck, teaching skills helping geeks feel safe in the world.