Hadley Wickham is chief scientist at Posit and a member of the R Foundation. He builds computational and cognitive tools that make data science easier, faster, and more fun. Mine Cetinkaya-Rundel is professor of the practice and director of undergraduate studies at the Department of Statistical Science at Duke University. She's also a developer educator at Posit. Garrett Grolemund is the author of Hands-on Programming with R and director of learning at Posit.