diff -r 28cb0bcaa22e Doc/library/subprocess.rst
--- a/Doc/library/subprocess.rst	Mon Jul 30 03:38:02 2012 -0700
+++ b/Doc/library/subprocess.rst	Mon Jul 30 16:23:14 2012 +0300
@@ -208,6 +208,30 @@
    output.
 
 
+.. exception:: SubprocessError
+
+    Base class for all other exceptions from this module.
+
+    .. versionadded:: 3.3
+
+
+.. exception:: TimeoutExpired
+
+    Exception raised when the timeout expires while waiting for a
+    child process.
+
+    .. versionadded:: 3.3
+
+
+.. exception:: CalledProcessError
+
+    Exception raised when a process run by check_call() or
+    check_output() returns a non-zero exit status.
+    The exit status will be stored in the returncode attribute;
+    check_output() will also store the output in the output attribute.
+
+
+
 .. _frequently-used-arguments:
 
 Frequently Used Arguments