Dave Thomas is a computer programmer, author and editor. He has written about Ruby and together with Andy Hunt, he co-authored The Pragmatic Programmer and runs The Pragmatic Bookshelf publishing company. Thomas moved to the United States from England in 1994 and lives north of Dallas, Texas. Thomas coined the phrases 'Code Kata' and 'DRY' (Don't Repeat Yourself), and was an original signatory and author of the Agile Manifesto.