.. _someos:

**********************************
Optional Operating System Services
**********************************

The modules described in this chapter provide interfaces to operating system
features that are available on selected operating systems only. The interfaces
are generally modeled after the Unix or C interfaces but they are available on
some other systems as well (e.g. Windows).  Here's an overview:


.. toctree::

   select.rst
   threading.rst
   dummy_threading.rst
   _thread.rst
   _dummy_thread.rst
   multiprocessing.rst
   mmap.rst
   readline.rst
   rlcompleter.rst