Introduction This is the third in a series of articles exploring the Gleam programming language. The first article explored some of the most basic features of Gleam; just enough to say hello. The second discussed looping constructs, namely that gleam doesn’t have them. This one was supposed to investigate how Gleam integrates with Erlang’s famous OTP library for concurrency and fault tolerance. But I got sidetracked and ended up doing a second article on recursion and tail recursion instead.