Welcome to Erlang/OTP, a complete
development environment
for concurrent programming.
Note that functions that are not imported or prefixed with a module name belong to the built-in module erlang (in the Kernel application).
% erl -man <module name>
Also note that there are some shell features like history list (control-p and control-n), in line editing (emacs key bindings) and module and function name completion (tab) if the module is loaded.