Erlang in Erlang
There is an erlang under erlang (known as core erlang). Take an interesting voyage through part of erlang's inner realm.
by Dan Janowski
on Aug 10, 2026
Take a glimpse into the curious and fascinating world of Erlang. Underneath Erlang as we know it is another language known as core-erlang which is mostly an unseen compiler intermediate step. You can look at it. You can read and understand it. Maybe it is just a curiosity. It is a fancy, I mean simpler, one though.
Documentation is limited in number, but with depth. From its public paper dating from 2000, contributors including a cast of famous (for Erlang) characters, to the casual by-example guide written by the current B in BEAM in 2018.
See what you think.
Start with Core Erlang by Example
Then, if you are intrigued, Core Erlang Language Specification