Move the 3k reST doc tree in place.
diff --git a/Doc/library/someos.rst b/Doc/library/someos.rst
new file mode 100644
index 0000000..5ee96bc
--- /dev/null
+++ b/Doc/library/someos.rst
@@ -0,0 +1,23 @@
+
+.. _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 or NT). Here's an overview:
+
+
+.. toctree::
+
+ select.rst
+ thread.rst
+ threading.rst
+ dummy_thread.rst
+ dummy_threading.rst
+ mmap.rst
+ readline.rst
+ rlcompleter.rst