C2 is the first wiki, hosted on the website of the software consulting firm Cunningham & Cunningham. As with all things that were once new technology, it was at one time full of people talking about the tools used to make it, and now seems to be full of nobody whatsoever. In this case, the focus of discussion was not so narrow as to be the proper construction of a wiki, but was instead the field of computer science in general. As a result, it's a great place to learn about the history of CS. C2 articles are formatted much like discussions, and bear a great deal more similarity to nodes here on E2 than to articles on Wikipedia.