# John Chambers, the inventor of S, added reference classes to R…

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John Chambers, the inventor of S, added reference classes to R 2.12, and oh boy are they fun to look at! What you see in the picture above is a “Hello World” web application for R. It’s written using the Rack R package (not unlike Ruby’s Rack). If you’re interested in hearing more about it, come to the useR New York meetup on March 15. If you can’t make that, then I’ll be speaking on the same topic at the R/Finance conference in Chicago at the end of April.

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