# 37. Undocumented Modules

Here’s a quick listing of modules that are currently undocumented, but that should be documented. Feel free to contribute documentation for them! (Send via email to docs@python.org.)

The idea and original contents for this chapter were taken from a posting by Fredrik Lundh; the specific contents of this chapter have been substantially revised.

## 37.1. Platform specific modules

These modules are used to implement the `os.path` module, and are not documented beyond this mention. There’s little need to document these.

`ntpath`
  — Implementation of `os.path` on Win32 and Win64 platforms.
`posixpath`
  — Implementation of `os.path` on POSIX.