diff --git a/Lib/pdb.py b/Lib/pdb.py
index d7fe54a..6e074a9 100755
--- a/Lib/pdb.py
+++ b/Lib/pdb.py
@@ -13,6 +13,9 @@
 import os
 import re
 
+__all__ = ["run", "pm", "Pdb", "runeval", "runctx", "runcall", "set_trace",
+           "post_mortem", "help"]
+
 def find_function(funcname, filename):
     cre = re.compile(r'def\s+%s\s*[(]' % funcname)
     try:
diff --git a/Lib/pickle.py b/Lib/pickle.py
index 1ec5b49..b0c6a79 100644
--- a/Lib/pickle.py
+++ b/Lib/pickle.py
@@ -31,6 +31,9 @@
 import sys
 import struct
 
+__all__ = ["PickleError", "PicklingError", "UnpicklingError", "Pickler",
+           "Unpickler", "dump", "dumps", "load", "loads"]
+
 format_version = "1.3"                     # File format version we write
 compatible_formats = ["1.0", "1.1", "1.2"] # Old format versions we can read
 
diff --git a/Lib/pipes.py b/Lib/pipes.py
index 77a57e8..ceb32a8 100644
--- a/Lib/pipes.py
+++ b/Lib/pipes.py
@@ -56,7 +56,7 @@
    t2 = t.clone()
 
 For an example, see the function test() at the end of the file.
-"""
+"""                                     # '
 
 
 import sys
@@ -66,6 +66,7 @@
 import tempfile
 import string
 
+__all__ = ["Template"]
 
 # Conversion step kinds
 
diff --git a/Lib/popen2.py b/Lib/popen2.py
index e1bf363..954eb29 100644
--- a/Lib/popen2.py
+++ b/Lib/popen2.py
@@ -9,6 +9,8 @@
 import os
 import sys
 
+__all__ = ["popen2", "popen3", "popen4"]
+
 MAXFD = 256     # Max number of file descriptors (os.getdtablesize()???)
 
 _active = []
@@ -155,7 +157,8 @@
         inst = Popen4(cmd, bufsize)
         return inst.fromchild, inst.tochild
 
-
+    __all__.extend(["Popen3", "Popen4"])
+    
 def _test():
     cmd  = "cat"
     teststr = "ab cd\n"
diff --git a/Lib/test/test___all__.py b/Lib/test/test___all__.py
index a3ae956..f6f00c5 100644
--- a/Lib/test/test___all__.py
+++ b/Lib/test/test___all__.py
@@ -95,4 +95,8 @@
 check_all("ntpath")
 check_all("nturl2path")
 check_all("os")
+check_all("pdb")
+check_all("pickle")
+check_all("pipes")
+check_all("popen2")
 check_all("robotparser")