In episode 25, we talk with Andrew Head, Ph.D. Candidate in Computer Science at UC Berkeley, about his research on how developers use API documentation. Specifically, we focused on a recent article he co-authored titled . During the podcast, we chat about the following: where developers look for information, how developers manage information in Google’s unique billion-line code base, when it's appropriate to just let developers read the code directly versus creating documentation, what kind of information developers look for in API documentation, the relevance of document generators such as Doxygen, and more. Andrew also talked about some projects he's working on to build interactive tools for developers to share code expertise.