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David Griffiths began programming at age 12, after being inspired by a documentary on the work of Seymour Papert. At age 15 he wrote an implementation of Papert's computer language LOGO. After studying Pure Mathematics at University, he began writing code for computers and magazine articles for humans and he is currently an agile coach in the UK, helping people to create simpler, more valuable software. He spends his free time traveling and time with his lovely wife, Dawn.