diff --git a/Doc-26/library/collections.rst b/Doc-26/library/collections.rst
index e2f6b7ff6..e5203d94c 100644
--- a/Doc-26/library/collections.rst
+++ b/Doc-26/library/collections.rst
@@ -10,10 +10,16 @@
 
 .. versionadded:: 2.4
 
-This module implements high-performance container datatypes.  Currently, there
-are two datatypes, deque and defaultdict, and one datatype factory function,
-:func:`NamedTuple`. Future additions may include balanced trees and ordered
-dictionaries.
+This module implements high-performance container datatypes.  Currently,
+there are two datatypes, :class:`deque` and :class:`defaultdict`, and
+one datatype factory function, :func:`NamedTuple`. Python already
+includes built-in containers, :func:`dict`, :func:`list`, and
+:func:`tuple`. The optional :mod:`bsddb` module has a :meth:`btopen`
+method that can be used to create in-memory or file based ordered
+dictionaries with string keys.
+
+Future editions of the standard library may include balanced trees and
+ordered dictionaries.
 
 .. versionchanged:: 2.5
    Added defaultdict.