itertools, operator and functools are not really "numeric" modules; move them into their own "functional" chapter.
diff --git a/Doc/library/functional.rst b/Doc/library/functional.rst
new file mode 100644
index 0000000..5b6185a
--- /dev/null
+++ b/Doc/library/functional.rst
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+******************************
+Functional Programming Modules
+******************************
+
+The modules described in this chapter provide functions and classes that support
+a functional programming style, and general operations on callables.
+
+The following modules are documented in this chapter:
+
+
+.. toctree::
+
+ itertools.rst
+ functools.rst
+ operator.rst