diff --git a/Demo/tkinter/ttk/ttkcalendar.py b/Demo/tkinter/ttk/ttkcalendar.py
index faa45c5..f163170 100644
--- a/Demo/tkinter/ttk/ttkcalendar.py
+++ b/Demo/tkinter/ttk/ttkcalendar.py
@@ -191,7 +191,7 @@
 
         self._date = self._date - self.timedelta(days=1)
         self._date = self.datetime(self._date.year, self._date.month, 1)
-        self._build_calendar() # reconstuct calendar
+        self._build_calendar() # reconstruct calendar
 
     def _next_month(self):
         """Update calendar to show the next month."""
diff --git a/Include/pymacconfig.h b/Include/pymacconfig.h
index 24e7b8d..0c28f5c 100644
--- a/Include/pymacconfig.h
+++ b/Include/pymacconfig.h
@@ -66,7 +66,7 @@
       * Therefore surpress the toolbox-glue in 64-bit mode.
       */
 
-    /* In 64-bit mode setpgrp always has no argments, in 32-bit
+    /* In 64-bit mode setpgrp always has no arguments, in 32-bit
      * mode that depends on the compilation environment
      */
 #       undef SETPGRP_HAVE_ARG
diff --git a/Lib/Cookie.py b/Lib/Cookie.py
index b1704d9..1082363 100644
--- a/Lib/Cookie.py
+++ b/Lib/Cookie.py
@@ -190,7 +190,7 @@
 Backwards Compatibility
 -----------------------
 
-In order to keep compatibilty with earlier versions of Cookie.py,
+In order to keep compatibility with earlier versions of Cookie.py,
 it is still possible to use Cookie.Cookie() to create a Cookie.  In
 fact, this simply returns a SmartCookie.
 
diff --git a/Lib/_osx_support.py b/Lib/_osx_support.py
index 8d3e5d8..d2aaae7 100644
--- a/Lib/_osx_support.py
+++ b/Lib/_osx_support.py
@@ -157,7 +157,7 @@
     #    gcc-4.2 is either not present, or a copy of 'llvm-gcc' that
     #    miscompiles Python.
 
-    # skip checks if the compiler was overriden with a CC env variable
+    # skip checks if the compiler was overridden with a CC env variable
     if 'CC' in os.environ:
         return _config_vars
 
@@ -193,7 +193,7 @@
     if cc != oldcc:
         # Found a replacement compiler.
         # Modify config vars using new compiler, if not already explicitly
-        # overriden by an env variable, preserving additional arguments.
+        # overridden by an env variable, preserving additional arguments.
         for cv in _COMPILER_CONFIG_VARS:
             if cv in _config_vars and cv not in os.environ:
                 cv_split = _config_vars[cv].split()
@@ -207,7 +207,7 @@
     """Remove all universal build arguments from config vars"""
 
     for cv in _UNIVERSAL_CONFIG_VARS:
-        # Do not alter a config var explicitly overriden by env var
+        # Do not alter a config var explicitly overridden by env var
         if cv in _config_vars and cv not in os.environ:
             flags = _config_vars[cv]
             flags = re.sub('-arch\s+\w+\s', ' ', flags)
@@ -228,7 +228,7 @@
     # build extensions on OSX 10.7 and later with the prebuilt
     # 32-bit installer on the python.org website.
 
-    # skip checks if the compiler was overriden with a CC env variable
+    # skip checks if the compiler was overridden with a CC env variable
     if 'CC' in os.environ:
         return _config_vars
 
@@ -244,7 +244,7 @@
             # across Xcode and compiler versions, there is no reliable way
             # to be sure why it failed.  Assume here it was due to lack of
             # PPC support and remove the related '-arch' flags from each
-            # config variables not explicitly overriden by an environment
+            # config variables not explicitly overridden by an environment
             # variable.  If the error was for some other reason, we hope the
             # failure will show up again when trying to compile an extension
             # module.
@@ -292,7 +292,7 @@
         sdk = m.group(1)
         if not os.path.exists(sdk):
             for cv in _UNIVERSAL_CONFIG_VARS:
-                # Do not alter a config var explicitly overriden by env var
+                # Do not alter a config var explicitly overridden by env var
                 if cv in _config_vars and cv not in os.environ:
                     flags = _config_vars[cv]
                     flags = re.sub(r'-isysroot\s+\S+(?:\s|$)', ' ', flags)
diff --git a/Lib/_pyio.py b/Lib/_pyio.py
index d8e1ee7..ccd6ce8 100644
--- a/Lib/_pyio.py
+++ b/Lib/_pyio.py
@@ -997,7 +997,7 @@
                 break
             avail += len(chunk)
             chunks.append(chunk)
-        # n is more then avail only when an EOF occurred or when
+        # n is more than avail only when an EOF occurred or when
         # read() would have blocked.
         n = min(n, avail)
         out = b"".join(chunks)
diff --git a/Lib/bsddb/test/test_all.py b/Lib/bsddb/test/test_all.py
index 004e357..529dfad 100644
--- a/Lib/bsddb/test/test_all.py
+++ b/Lib/bsddb/test/test_all.py
@@ -523,7 +523,7 @@
     return path
 
 
-# This path can be overriden via "set_test_path_prefix()".
+# This path can be overridden via "set_test_path_prefix()".
 import os, os.path
 get_new_path.prefix=os.path.join(os.environ.get("TMPDIR",
     os.path.join(os.sep,"tmp")), "z-Berkeley_DB")
diff --git a/Lib/decimal.py b/Lib/decimal.py
index 20d9468..4797a7d 100644
--- a/Lib/decimal.py
+++ b/Lib/decimal.py
@@ -1082,7 +1082,7 @@
     def __pos__(self, context=None):
         """Returns a copy, unless it is a sNaN.
 
-        Rounds the number (if more then precision digits)
+        Rounds the number (if more than precision digits)
         """
         if self._is_special:
             ans = self._check_nans(context=context)
diff --git a/Lib/distutils/tests/test_build_ext.py b/Lib/distutils/tests/test_build_ext.py
index d380cb6..3293c44 100644
--- a/Lib/distutils/tests/test_build_ext.py
+++ b/Lib/distutils/tests/test_build_ext.py
@@ -251,7 +251,7 @@
 
     def test_compiler_option(self):
         # cmd.compiler is an option and
-        # should not be overriden by a compiler instance
+        # should not be overridden by a compiler instance
         # when the command is run
         dist = Distribution()
         cmd = build_ext(dist)
diff --git a/Lib/hotshot/__init__.py b/Lib/hotshot/__init__.py
index 1556ab3..3692f93 100644
--- a/Lib/hotshot/__init__.py
+++ b/Lib/hotshot/__init__.py
@@ -72,7 +72,7 @@
 
         Additional positional and keyword arguments may be passed
         along; the result of the call is returned, and exceptions are
-        allowed to propogate cleanly, while ensuring that profiling is
+        allowed to propagate cleanly, while ensuring that profiling is
         disabled on the way out.
         """
         return self._prof.runcall(func, args, kw)
diff --git a/Lib/idlelib/AutoComplete.py b/Lib/idlelib/AutoComplete.py
index 5a90d42..9381bda 100644
--- a/Lib/idlelib/AutoComplete.py
+++ b/Lib/idlelib/AutoComplete.py
@@ -1,6 +1,6 @@
 """AutoComplete.py - An IDLE extension for automatically completing names.
 
-This extension can complete either attribute names of file names. It can pop
+This extension can complete either attribute names or file names. It can pop
 a window with all available names, for the user to select from.
 """
 import os
diff --git a/Lib/idlelib/MultiCall.py b/Lib/idlelib/MultiCall.py
index 31a4fb7..a157d7a 100644
--- a/Lib/idlelib/MultiCall.py
+++ b/Lib/idlelib/MultiCall.py
@@ -101,7 +101,7 @@
             self.widget.unbind(self.widgetinst, self.sequence, self.handlerid)
 
 # An int in range(1 << len(_modifiers)) represents a combination of modifiers
-# (if the least significent bit is on, _modifiers[0] is on, and so on).
+# (if the least significant bit is on, _modifiers[0] is on, and so on).
 # _state_subsets gives for each combination of modifiers, or *state*,
 # a list of the states which are a subset of it. This list is ordered by the
 # number of modifiers is the state - the most specific state comes first.
diff --git a/Lib/idlelib/rpc.py b/Lib/idlelib/rpc.py
index 5c4aabd..43328e7 100644
--- a/Lib/idlelib/rpc.py
+++ b/Lib/idlelib/rpc.py
@@ -1,4 +1,4 @@
-"""RPC Implemention, originally written for the Python Idle IDE
+"""RPC Implementation, originally written for the Python Idle IDE
 
 For security reasons, GvR requested that Idle's Python execution server process
 connect to the Idle process, which listens for the connection.  Since Idle has
diff --git a/Lib/locale.py b/Lib/locale.py
index 3ce758f..5aab163 100644
--- a/Lib/locale.py
+++ b/Lib/locale.py
@@ -16,7 +16,7 @@
 import operator
 import functools
 
-# keep a copy of the builtin str type, because 'str' name is overriden
+# keep a copy of the builtin str type, because 'str' name is overridden
 # in globals by a function below
 _str = str
 
diff --git a/Lib/pdb.doc b/Lib/pdb.doc
index 375be2f..c8c1c93 100644
--- a/Lib/pdb.doc
+++ b/Lib/pdb.doc
@@ -48,7 +48,7 @@
 directory, it is read in and executed as if it had been typed at the
 debugger prompt.  This is particularly useful for aliases.  If both
 files exist, the one in the home directory is read first and aliases
-defined there can be overriden by the local file.
+defined there can be overridden by the local file.
 
 Aside from aliases, the debugger is not directly programmable; but it
 is implemented as a class from which you can derive your own debugger
diff --git a/Lib/plat-mac/bgenlocations.py b/Lib/plat-mac/bgenlocations.py
index 38f4159..2f535d2 100644
--- a/Lib/plat-mac/bgenlocations.py
+++ b/Lib/plat-mac/bgenlocations.py
@@ -34,7 +34,7 @@
 # Creator for C files:
 CREATOR="CWIE"
 
-# The previous definitions can be overriden by creating a module
+# The previous definitions can be overridden by creating a module
 # bgenlocationscustomize.py and putting it in site-packages (or anywere else
 # on sys.path, actually)
 try:
diff --git a/Lib/test/test_socket.py b/Lib/test/test_socket.py
index 2387029..fe79b82 100644
--- a/Lib/test/test_socket.py
+++ b/Lib/test/test_socket.py
@@ -708,7 +708,7 @@
                 pass
 
     def check_sendall_interrupted(self, with_timeout):
-        # socketpair() is not stricly required, but it makes things easier.
+        # socketpair() is not strictly required, but it makes things easier.
         if not hasattr(signal, 'alarm') or not hasattr(socket, 'socketpair'):
             self.skipTest("signal.alarm and socket.socketpair required for this test")
         # Our signal handlers clobber the C errno by calling a math function
@@ -827,7 +827,7 @@
         self.serv_conn.sendall(big_chunk)
 
     @unittest.skipUnless(hasattr(socket, 'fromfd'),
-                         'socket.fromfd not availble')
+                         'socket.fromfd not available')
     def testFromFd(self):
         # Testing fromfd()
         fd = self.cli_conn.fileno()
diff --git a/Lib/test/test_sys_setprofile.py b/Lib/test/test_sys_setprofile.py
index e82559f..18b013d 100644
--- a/Lib/test/test_sys_setprofile.py
+++ b/Lib/test/test_sys_setprofile.py
@@ -165,7 +165,7 @@
                               (1, 'return', g_ident),
                               ])
 
-    def test_exception_propogation(self):
+    def test_exception_propagation(self):
         def f(p):
             1./0
         def g(p):
diff --git a/Misc/HISTORY b/Misc/HISTORY
index b8a4576..fa0c623 100644
--- a/Misc/HISTORY
+++ b/Misc/HISTORY
@@ -10009,7 +10009,7 @@
 
 	* Tools/scripts/dutree.py:
 	During display, if EPIPE is raised, it's probably because a pager was
-	killed.  Discard the error in that case, but propogate it otherwise.
+	killed.  Discard the error in that case, but propagate it otherwise.
 
 Fri Mar 26 16:20:45 1999  Guido van Rossum  <guido@eric.cnri.reston.va.us>
 
diff --git a/Misc/NEWS b/Misc/NEWS
index 1fed4cd..c52b294 100644
--- a/Misc/NEWS
+++ b/Misc/NEWS
@@ -2344,8 +2344,8 @@
   with port None or "0" and flags AI_NUMERICSERV.
 
 - Issue #18080: When building a C extension module on OS X, if the compiler
-  is overriden with the CC environment variable, use the new compiler as
-  the default for linking if LDSHARED is not also overriden.  This restores
+  is overridden with the CC environment variable, use the new compiler as
+  the default for linking if LDSHARED is not also overridden.  This restores
   Distutils behavior introduced in 2.7.3 and inadvertently dropped in 2.7.4.
 
 - Issue #18071: C extension module builds on OS X could fail with TypeError
@@ -5467,7 +5467,7 @@
 
 - Issue #7900: The getgroups(2) system call on MacOSX behaves rather oddly
   compared to other unix systems. In particular, os.getgroups() does
-  not reflect any changes made using os.setgroups() but basicly always
+  not reflect any changes made using os.setgroups() but basically always
   returns the same information as the id command.
 
   os.getgroups() can now return more than 16 groups on MacOSX.
@@ -8076,7 +8076,7 @@
   backported to help facilitate transitions from 2.7 to 3.1.
 
 - Issue #1885: distutils: When running sdist with --formats=tar,gztar the tar
-  file was overriden by the gztar one.
+  file was overridden by the gztar one.
 
 - Issue #4863: distutils.mwerkscompiler has been removed.
 
@@ -8365,7 +8365,7 @@
   installed.
 
 - Issue #5809: Specifying both --enable-framework and --enable-shared is an
-  error. Configure now explicity tells you about this.
+  error. Configure now explicitly tells you about this.
 
 - Issue #3585: Add pkg-config support.  It creates a python-2.7.pc file and a
   python.pc symlink in the $(LIBDIR)/pkgconfig directory.  Patch by Clinton Roy.
diff --git a/Modules/_bsddb.c b/Modules/_bsddb.c
index a319333..ed17d39 100644
--- a/Modules/_bsddb.c
+++ b/Modules/_bsddb.c
@@ -3686,7 +3686,7 @@
     /*
     ** DB_BUFFER_SMALL is only used if we use "get".
     ** We can drop it when we only use "exists",
-    ** when we drop suport for Berkeley DB < 4.6.
+    ** when we drop support for Berkeley DB < 4.6.
     */
     if (err == DB_BUFFER_SMALL || err == 0) {
         Py_INCREF(Py_True);
diff --git a/Modules/ld_so_aix.in b/Modules/ld_so_aix.in
index 39251d2..c18ff10 100644
--- a/Modules/ld_so_aix.in
+++ b/Modules/ld_so_aix.in
@@ -12,7 +12,7 @@
 #
 #   ARGUMENTS:      Same as for "ld". The following arguments are processed
 #                   or supplied by this script (those marked with an asterisk
-#                   can be overriden from command line):
+#                   can be overridden from command line):
 #
 #                       Argument                     Default value
 #                   (*) -o [OutputFileName]          -o shr.o
@@ -85,7 +85,7 @@
 fi
 
 # Default import file for Python
-# Can be overriden by providing a -bI: argument.
+# Can be overridden by providing a -bI: argument.
 impfile="./python.exp"
 
 # Parse arguments
@@ -156,7 +156,7 @@
 fi
 
 # Default entry symbol for Python modules = init[modulename]
-# Can be overriden by providing a -e argument.
+# Can be overridden by providing a -e argument.
 if test -z "$entry"; then
   entry=init`echo $filename | sed "s/module.*//"`
 fi
diff --git a/Modules/readline.c b/Modules/readline.c
index e3a5ed1..1600cd3 100644
--- a/Modules/readline.c
+++ b/Modules/readline.c
@@ -960,7 +960,7 @@
 
 #ifndef __APPLE__
     if (!isatty(STDOUT_FILENO)) {
-        /* Issue #19884: stdout is no a terminal. Disable meta modifier
+        /* Issue #19884: stdout is not a terminal. Disable meta modifier
            keys to not write the ANSI sequence "\033[1034h" into stdout. On
            terminals supporting 8 bit characters like TERM=xterm-256color
            (which is now the default Fedora since Fedora 18), the meta key is
diff --git a/Objects/fileobject.c b/Objects/fileobject.c
index 9ae068c..b29da8a 100644
--- a/Objects/fileobject.c
+++ b/Objects/fileobject.c
@@ -835,7 +835,7 @@
     if (initialpos == -1)
         goto onioerror;
 
-    /* Set newsize to current postion if newsizeobj NULL, else to the
+    /* Set newsize to current position if newsizeobj NULL, else to the
      * specified value.
      */
     if (newsizeobj != NULL) {
diff --git a/Tools/bgen/bgen/bgenVariable.py b/Tools/bgen/bgen/bgenVariable.py
index 0ad24b3..566438a 100644
--- a/Tools/bgen/bgen/bgenVariable.py
+++ b/Tools/bgen/bgen/bgenVariable.py
@@ -20,7 +20,7 @@
 
     """A Variable holds a type, a name, a transfer mode and flags.
 
-    Most of its methods call the correponding type method with the
+    Most of its methods call the corresponding type method with the
     variable name.
     """
 
diff --git a/setup.py b/setup.py
index 052fff8..aa08ada 100644
--- a/setup.py
+++ b/setup.py
@@ -770,7 +770,7 @@
                 # In every directory on the search path search for a dynamic
                 # library and then a static library, instead of first looking
                 # for dynamic libraries on the entire path.
-                # This way a staticly linked custom readline gets picked up
+                # This way a statically linked custom readline gets picked up
                 # before the (possibly broken) dynamic library in /usr/lib.
                 readline_extra_link_args = ('-Wl,-search_paths_first',)
             else:
@@ -1767,7 +1767,7 @@
         #     --with-tcltk-libs="-L/path/to/tcllibs -ltclm.n \
         #                        -L/path/to/tklibs -ltkm.n"
         #
-        # These values can also be specified or overriden via make:
+        # These values can also be specified or overridden via make:
         #    make TCLTK_INCLUDES="..." TCLTK_LIBS="..."
         #
         # This can be useful for building and testing tkinter with multiple