# Async_unix Async_unix includes Unix-related dependencies for things like system calls and threads. Using these, it hooks the Async_kernel scheduler up to either `epoll` or `select`, depending on availability, and manages a thread pool that blocking system calls run in. API documentation for the latest release can be found [here][https://ocaml.janestreet.com/ocaml-core/latest/doc/async/index.html].