'Hello, World!'
Hello-World style introductory programs are intended to give the prospective programmer for that language a sense of what it is like to write a minimalist piece of software with the language in question. In particular, it should show off the minimum capabilitiues of the language. Practically, this type of program should sigify to the curious coder what they could be in for, should they decide upon this particular path.
In the case of LFE/OTP, a standard Hello-World program (essentially a "print" statement) is extremely misleading; more on that in the OTP version of the Hello-World program. Regardless, we concede to conventional practice and produce a minimal Hello-World that does what many other languages' Hello-World programs do. We do, however, go further afterwards ...