erlang-base - 1:21.2.6+dfsg-1 main

This package contains the Erlang/OTP runtime implementation, which is
configured and built without HiPE support (compiles to byte-code only),
and minimal set of Erlang applications:
compiler - compiles Erlang code to byte-code;
erts - the Erlang runtime system application;
kernel - code necessary to run the Erlang runtime system itself;
ose - code for Enea OSE operating system;
sasl - the system architecture support libraries application;
stdlib - modules for manipulating lists, strings, files etc.