# 19.7 Extension modules

bsddbmodule.c
  -- Interface to the Berkeley DB interface (yet another dbm clone).

cursesmodule.c
  -- Curses interface.

dlmodule.c
  -- A highly experimental and dangerous device for calling arbitrary C functions in arbitrary shared libraries.

newmodule.c
  -- Tommy Burnette's `new` module (creates new empty objects of certain kinds) -- dangerous.

nismodule.c
  -- NIS (a.k.a. Sun's Yellow Pages) interface.

stdwinmodule.c
  -- Interface to STDWIN (an old, unsupported platform-independent GUI package). Obsolete; use Tkinter for a platform-independent GUI instead.

The following are SGI specific:

clmodule.c
  -- Interface to the SGI compression library.

svmodule.c
  -- Interface to the ``simple video'' board on SGI Indigo (obsolete hardware).