# A.3 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, Win64, WinCE, and OS/2 platforms.

`posixpath`
  -- Implementation of `os.path` on POSIX.

`bsddb185`
  -- Backwards compatibility module for systems which still use the Berkeley DB 1.85 module. It is normally only available on certain BSD Unix-based systems. It should never be used directly.