What is the term for modules shipped in Elixir?

https://hexdocs.pm/elixir/Kernel.html list modules in following groups, mostly by “purpose”.

  • Built-in types
  • Data types
  • System modules
  • Protocols
  • Process-based and application-centric functionality

However, when I need to refer any modules come with Elixir - what’s the term for that? e.g. built-in module, core module, standard library module, … I tried to find something in the official doc, but could not find it.

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In this post, José, creator of Elixir, uses ‘core’ and ‘standard library’.