This blog post aims to give a brief introduction to S7, a new R package for OOP in R. It’s not a tutorial on how to write code using S7 - the documentation provides great instructions for getting started if you’re already ready to start programming in S7. Note: This blog post has been updated to reflect the change in name from R7 to S7. What is OOP? Before we talk about S7, we should probably talk about OOP.