# erts v16.4 - API Reference

## Modules

- [atomics](atomics.md): Atomic Functions
- [counters](counters.md): Counter Functions
- [erl_prim_loader](erl_prim_loader.md): The low-level Erlang loader. This module is used to load all Erlang modules into
the system. The start script is also fetched with this low-level loader.
- [erl_tracer](erl_tracer.md): Erlang tracer behavior.
- [erlang](erlang.md): The Erlang BIFs and predefined types.
- [init](init.md): Coordination of system startup.
- [persistent_term](persistent_term.md): Persistent terms.
- [zlib](zlib.md): zlib compression interface.