--- rest25/library/allos.rst	2008-12-19 16:58:07.000000000 +0900
+++ rest262/library/allos.rst	2009-04-05 05:02:09.000000000 +0900
@@ -5,23 +5,24 @@
 Generic Operating System Services
 *********************************
 
 The modules described in this chapter provide interfaces to operating system
 features that are available on (almost) all operating systems, such as files and
 a clock.  The interfaces are generally modeled after the Unix or C interfaces,
 but they are available on most other systems as well.  Here's an overview:
 
 
 .. toctree::
 
    os.rst
+   io.rst
    time.rst
    optparse.rst
    getopt.rst
    logging.rst
    getpass.rst
    curses.rst
    curses.ascii.rst
    curses.panel.rst
    platform.rst
    errno.rst
    ctypes.rst
