Meet the 30 Under 30, Class of 2012

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Codecademy

While in YCombinator last summer, Zach Sims wanted to improve his programming skills. Ryan Buminski wanted to teach. In three weeks they launched Codecademy, a site that teaches programming languages. By the end of 2011, the site had more than a million users. One of them could soon be New York City mayor Michael Bloomberg, who recently announced he wanted to learn to code. Read more