diff --git a/Doc/includes/sqlite3/shared_cache.py b/Doc/includes/sqlite3/shared_cache.py
index bf1d7b4a21d3..30e71c935ff6 100644
--- a/Doc/includes/sqlite3/shared_cache.py
+++ b/Doc/includes/sqlite3/shared_cache.py
@@ -1,6 +1,6 @@
 import sqlite3
 
 # The shared cache is only available in SQLite versions 3.3.3 or later
-# See the SQLite documentaton for details.
+# See the SQLite documentation for details.
 
 sqlite3.enable_shared_cache(True)
diff --git a/Include/abstract.h b/Include/abstract.h
index 5f2d541e2800..0fe0956b14f7 100644
--- a/Include/abstract.h
+++ b/Include/abstract.h
@@ -468,7 +468,7 @@ xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx*/
       arbitrary data.
 
       0 is returned on success.  buffer and buffer_len are only
-      set in case no error occurrs.  Otherwise, -1 is returned and
+      set in case no error occurs.  Otherwise, -1 is returned and
       an exception set.
        */
 
@@ -482,7 +482,7 @@ xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx*/
       writable memory location in buffer of size buffer_len.
 
       0 is returned on success.  buffer and buffer_len are only
-      set in case no error occurrs. Otherwise, -1 is returned and
+      set in case no error occurs. Otherwise, -1 is returned and
       an exception set.
        */
 
diff --git a/Include/pymacconfig.h b/Include/pymacconfig.h
index 6d4a971fc597..24e7b8dac61c 100644
--- a/Include/pymacconfig.h
+++ b/Include/pymacconfig.h
@@ -61,7 +61,7 @@
 #    endif
 
 #    if defined(__LP64__)
-     /* MacOSX 10.4 (the first release to suppport 64-bit code
+     /* MacOSX 10.4 (the first release to support 64-bit code
       * at all) only supports 64-bit in the UNIX layer.
       * Therefore surpress the toolbox-glue in 64-bit mode.
       */
diff --git a/Lib/csv.py b/Lib/csv.py
index e0f47e8b5d36..8dfc77e31086 100644
--- a/Lib/csv.py
+++ b/Lib/csv.py
@@ -284,7 +284,7 @@ class Sniffer:
         an all or nothing approach, so we allow for small variations in this
         number.
           1) build a table of the frequency of each character on every line.
-          2) build a table of freqencies of this frequency (meta-frequency?),
+          2) build a table of frequencies of this frequency (meta-frequency?),
              e.g.  'x occurred 5 times in 10 rows, 6 times in 1000 rows,
              7 times in 2 rows'
           3) use the mode of the meta-frequency to determine the /expected/
diff --git a/Lib/ctypes/test/test_arrays.py b/Lib/ctypes/test/test_arrays.py
index 1a6f3b2a6551..f2a9f078c98e 100644
--- a/Lib/ctypes/test/test_arrays.py
+++ b/Lib/ctypes/test/test_arrays.py
@@ -37,7 +37,7 @@ class ArrayTestCase(unittest.TestCase):
             values = [ia[i] for i in range(len(init))]
             self.assertEqual(values, [0] * len(init))
 
-            # Too many in itializers should be caught
+            # Too many initializers should be caught
             self.assertRaises(IndexError, int_array, *range(alen*2))
 
         CharArray = ARRAY(c_char, 3)
diff --git a/Lib/ctypes/test/test_init.py b/Lib/ctypes/test/test_init.py
index 94928c846a7c..75fad112a01f 100644
--- a/Lib/ctypes/test/test_init.py
+++ b/Lib/ctypes/test/test_init.py
@@ -27,7 +27,7 @@ class InitTest(unittest.TestCase):
         self.assertEqual((y.x.a, y.x.b), (0, 0))
         self.assertEqual(y.x.new_was_called, False)
 
-        # But explicitely creating an X structure calls __new__ and __init__, of course.
+        # But explicitly creating an X structure calls __new__ and __init__, of course.
         x = X()
         self.assertEqual((x.a, x.b), (9, 12))
         self.assertEqual(x.new_was_called, True)
diff --git a/Lib/ctypes/test/test_numbers.py b/Lib/ctypes/test/test_numbers.py
index 24d7293e893e..244dbaf51224 100644
--- a/Lib/ctypes/test/test_numbers.py
+++ b/Lib/ctypes/test/test_numbers.py
@@ -157,7 +157,7 @@ class NumberTestCase(unittest.TestCase):
     def test_int_from_address(self):
         from array import array
         for t in signed_types + unsigned_types:
-            # the array module doesn't suppport all format codes
+            # the array module doesn't support all format codes
             # (no 'q' or 'Q')
             try:
                 array(t._type_)
diff --git a/Lib/ctypes/test/test_win32.py b/Lib/ctypes/test/test_win32.py
index 5dedd9f1f620..2534a748cd95 100644
--- a/Lib/ctypes/test/test_win32.py
+++ b/Lib/ctypes/test/test_win32.py
@@ -17,7 +17,7 @@ if sys.platform == "win32" and sizeof(c_void_p) == sizeof(c_int):
             # ValueError: Procedure probably called with not enough arguments (4 bytes missing)
             self.assertRaises(ValueError, IsWindow)
 
-            # This one should succeeed...
+            # This one should succeed...
             self.assertEqual(0, IsWindow(0))
 
             # ValueError: Procedure probably called with too many arguments (8 bytes in excess)
diff --git a/Lib/difflib.py b/Lib/difflib.py
index 381721a251d6..003e72e28363 100644
--- a/Lib/difflib.py
+++ b/Lib/difflib.py
@@ -1719,7 +1719,7 @@ class HtmlDiff(object):
             line = line.replace(' ','\0')
             # expand tabs into spaces
             line = line.expandtabs(self._tabsize)
-            # relace spaces from expanded tabs back into tab characters
+            # replace spaces from expanded tabs back into tab characters
             # (we'll replace them with markup after we do differencing)
             line = line.replace(' ','\t')
             return line.replace('\0',' ').rstrip('\n')
diff --git a/Lib/distutils/cmd.py b/Lib/distutils/cmd.py
index ae4efc7efc31..5b1d085c327e 100644
--- a/Lib/distutils/cmd.py
+++ b/Lib/distutils/cmd.py
@@ -359,7 +359,7 @@ class Command:
                                   not self.force, dry_run=self.dry_run)
 
     def move_file (self, src, dst, level=1):
-        """Move a file respectin dry-run flag."""
+        """Move a file respecting dry-run flag."""
         return file_util.move_file(src, dst, dry_run=self.dry_run)
 
     def spawn(self, cmd, search_path=1, level=1):
diff --git a/Lib/distutils/cygwinccompiler.py b/Lib/distutils/cygwinccompiler.py
index 95fa3ed3c8cb..536aa6b61b26 100644
--- a/Lib/distutils/cygwinccompiler.py
+++ b/Lib/distutils/cygwinccompiler.py
@@ -155,7 +155,7 @@ class CygwinCCompiler(UnixCCompiler):
             self.dll_libraries = get_msvcr()
 
     def _compile(self, obj, src, ext, cc_args, extra_postargs, pp_opts):
-        """Compiles the source by spawing GCC and windres if needed."""
+        """Compiles the source by spawning GCC and windres if needed."""
         if ext == '.rc' or ext == '.res':
             # gcc needs '.res' and '.rc' compiled to object files !!!
             try:
diff --git a/Lib/distutils/tests/test_clean.py b/Lib/distutils/tests/test_clean.py
index 649855f7ab45..eb8958bff5a7 100644
--- a/Lib/distutils/tests/test_clean.py
+++ b/Lib/distutils/tests/test_clean.py
@@ -39,7 +39,7 @@ class cleanTestCase(support.TempdirManager,
             self.assertTrue(not os.path.exists(path),
                          '%s was not removed' % path)
 
-        # let's run the command again (should spit warnings but suceed)
+        # let's run the command again (should spit warnings but succeed)
         cmd.all = 1
         cmd.ensure_finalized()
         cmd.run()
diff --git a/Lib/distutils/tests/test_install.py b/Lib/distutils/tests/test_install.py
index a76e3e7a3cb0..ed69b0cbb066 100644
--- a/Lib/distutils/tests/test_install.py
+++ b/Lib/distutils/tests/test_install.py
@@ -62,7 +62,7 @@ class InstallTestCase(support.TempdirManager,
         if sys.version < '2.6':
             return
 
-        # preparing the environement for the test
+        # preparing the environment for the test
         self.old_user_base = site.USER_BASE
         self.old_user_site = site.USER_SITE
         self.tmpdir = self.mkdtemp()
diff --git a/Lib/distutils/tests/test_sdist.py b/Lib/distutils/tests/test_sdist.py
index eaf39a45baec..c7dd47fb5c35 100644
--- a/Lib/distutils/tests/test_sdist.py
+++ b/Lib/distutils/tests/test_sdist.py
@@ -311,7 +311,7 @@ class SDistTestCase(PyPIRCCommandTestCase):
         # adding a file
         self.write_file((self.tmp_dir, 'somecode', 'doc2.txt'), '#')
 
-        # make sure build_py is reinitinialized, like a fresh run
+        # make sure build_py is reinitialized, like a fresh run
         build_py = dist.get_command_obj('build_py')
         build_py.finalized = False
         build_py.ensure_finalized()
diff --git a/Lib/doctest.py b/Lib/doctest.py
index b79db17881e2..9eba4e0b5056 100644
--- a/Lib/doctest.py
+++ b/Lib/doctest.py
@@ -1211,7 +1211,7 @@ class DocTestRunner:
         # Process each example.
         for examplenum, example in enumerate(test.examples):
 
-            # If REPORT_ONLY_FIRST_FAILURE is set, then supress
+            # If REPORT_ONLY_FIRST_FAILURE is set, then suppress
             # reporting after the first failure.
             quiet = (self.optionflags & REPORT_ONLY_FIRST_FAILURE and
                      failures > 0)
@@ -2133,7 +2133,7 @@ class DocTestCase(unittest.TestCase):
            caller can catch the errors and initiate post-mortem debugging.
 
            The DocTestCase provides a debug method that raises
-           UnexpectedException errors if there is an unexepcted
+           UnexpectedException errors if there is an unexpected
            exception:
 
              >>> test = DocTestParser().get_doctest('>>> raise KeyError\n42',
diff --git a/Lib/email/header.py b/Lib/email/header.py
index e1716176fa08..d3118b03ebda 100644
--- a/Lib/email/header.py
+++ b/Lib/email/header.py
@@ -47,7 +47,7 @@ ecre = re.compile(r'''
 # For use with .match()
 fcre = re.compile(r'[\041-\176]+:$')
 
-# Find a header embeded in a putative header value.  Used to check for
+# Find a header embedded in a putative header value.  Used to check for
 # header injection attack.
 _embeded_header = re.compile(r'\n[^ \t]+:')
 
diff --git a/Lib/idlelib/FormatParagraph.py b/Lib/idlelib/FormatParagraph.py
index 02f96d493a3b..6a5f9b5dd591 100644
--- a/Lib/idlelib/FormatParagraph.py
+++ b/Lib/idlelib/FormatParagraph.py
@@ -54,7 +54,7 @@ class FormatParagraph:
             # If the block ends in a \n, we dont want the comment
             # prefix inserted after it. (Im not sure it makes sense to
             # reformat a comment block that isnt made of complete
-            # lines, but whatever!)  Can't think of a clean soltution,
+            # lines, but whatever!)  Can't think of a clean solution,
             # so we hack away
             block_suffix = ""
             if not newdata[-1]:
diff --git a/Lib/idlelib/extend.txt b/Lib/idlelib/extend.txt
index f5fb3e0409c7..165e044b5d10 100644
--- a/Lib/idlelib/extend.txt
+++ b/Lib/idlelib/extend.txt
@@ -18,7 +18,7 @@ window.
 
 An IDLE extension class is instantiated with a single argument,
 `editwin', an EditorWindow instance. The extension cannot assume much
-about this argument, but it is guarateed to have the following instance
+about this argument, but it is guaranteed to have the following instance
 variables:
 
     text	a Text instance (a widget)
diff --git a/Lib/idlelib/macosxSupport.py b/Lib/idlelib/macosxSupport.py
index 30dd1e12c1f8..f93ef118dbfc 100644
--- a/Lib/idlelib/macosxSupport.py
+++ b/Lib/idlelib/macosxSupport.py
@@ -53,8 +53,8 @@ def tkVersionWarning(root):
 
 def addOpenEventSupport(root, flist):
     """
-    This ensures that the application will respont to open AppleEvents, which
-    makes is feaseable to use IDLE as the default application for python files.
+    This ensures that the application will respond to open AppleEvents, which
+    makes is feasible to use IDLE as the default application for python files.
     """
     def doOpenFile(*args):
         for fn in args:
diff --git a/Lib/lib2to3/fixes/fix_metaclass.py b/Lib/lib2to3/fixes/fix_metaclass.py
index f924ace09e47..7d4d002f976b 100644
--- a/Lib/lib2to3/fixes/fix_metaclass.py
+++ b/Lib/lib2to3/fixes/fix_metaclass.py
@@ -48,7 +48,7 @@ def fixup_parse_tree(cls_node):
     """
     for node in cls_node.children:
         if node.type == syms.suite:
-            # already in the prefered format, do nothing
+            # already in the preferred format, do nothing
             return
 
     # !%@#! oneliners have no suite node, we have to fake one up
diff --git a/Lib/lib2to3/pgen2/conv.py b/Lib/lib2to3/pgen2/conv.py
index 1d648d6a2e58..bf49762ae482 100644
--- a/Lib/lib2to3/pgen2/conv.py
+++ b/Lib/lib2to3/pgen2/conv.py
@@ -51,7 +51,7 @@ class Converter(grammar.Grammar):
         self.finish_off()
 
     def parse_graminit_h(self, filename):
-        """Parse the .h file writen by pgen.  (Internal)
+        """Parse the .h file written by pgen.  (Internal)
 
         This file is a sequence of #define statements defining the
         nonterminals of the grammar as numbers.  We build two tables
@@ -82,7 +82,7 @@ class Converter(grammar.Grammar):
         return True
 
     def parse_graminit_c(self, filename):
-        """Parse the .c file writen by pgen.  (Internal)
+        """Parse the .c file written by pgen.  (Internal)
 
         The file looks as follows.  The first two lines are always this:
 
diff --git a/Lib/lib2to3/pytree.py b/Lib/lib2to3/pytree.py
index 100232b61c0b..fa4942f39214 100644
--- a/Lib/lib2to3/pytree.py
+++ b/Lib/lib2to3/pytree.py
@@ -658,8 +658,8 @@ class WildcardPattern(BasePattern):
             content: optional sequence of subsequences of patterns;
                      if absent, matches one node;
                      if present, each subsequence is an alternative [*]
-            min: optinal minumum number of times to match, default 0
-            max: optional maximum number of times tro match, default HUGE
+            min: optional minimum number of times to match, default 0
+            max: optional maximum number of times to match, default HUGE
             name: optional name assigned to this match
 
         [*] Thus, if content is [[a, b, c], [d, e], [f, g, h]] this is
diff --git a/Lib/lib2to3/tests/data/py2_test_grammar.py b/Lib/lib2to3/tests/data/py2_test_grammar.py
index 17f9f4c51c06..b5a4137d1615 100644
--- a/Lib/lib2to3/tests/data/py2_test_grammar.py
+++ b/Lib/lib2to3/tests/data/py2_test_grammar.py
@@ -316,7 +316,7 @@ class GrammarTests(unittest.TestCase):
         ### simple_stmt: small_stmt (';' small_stmt)* [';']
         x = 1; pass; del x
         def foo():
-            # verify statments that end with semi-colons
+            # verify statements that end with semi-colons
             x = 1; pass; del x;
         foo()
 
diff --git a/Lib/lib2to3/tests/data/py3_test_grammar.py b/Lib/lib2to3/tests/data/py3_test_grammar.py
index 977f0b8b35fa..c0bf7f27aa52 100644
--- a/Lib/lib2to3/tests/data/py3_test_grammar.py
+++ b/Lib/lib2to3/tests/data/py3_test_grammar.py
@@ -356,7 +356,7 @@ class GrammarTests(unittest.TestCase):
         ### simple_stmt: small_stmt (';' small_stmt)* [';']
         x = 1; pass; del x
         def foo():
-            # verify statments that end with semi-colons
+            # verify statements that end with semi-colons
             x = 1; pass; del x;
         foo()
 
diff --git a/Lib/ntpath.py b/Lib/ntpath.py
index 579673d34e8d..419342d0c146 100644
--- a/Lib/ntpath.py
+++ b/Lib/ntpath.py
@@ -405,7 +405,7 @@ def expanduser(path):
 #       - $varname is accepted.
 #       - %varname% is accepted.
 #       - varnames can be made out of letters, digits and the characters '_-'
-#         (though is not verifed in the ${varname} and %varname% cases)
+#         (though is not verified in the ${varname} and %varname% cases)
 # XXX With COMMAND.COM you can use any characters in a variable name,
 # XXX except '^|<>='.
 
diff --git a/Lib/pickletools.py b/Lib/pickletools.py
index 89a8e5845a36..3061675c220f 100644
--- a/Lib/pickletools.py
+++ b/Lib/pickletools.py
@@ -1406,7 +1406,7 @@ opcodes = [
       proto=0,
       doc="""Read an object from the memo and push it on the stack.
 
-      The index of the memo object to push is given by the newline-teriminated
+      The index of the memo object to push is given by the newline-terminated
       decimal string following.  BINGET and LONG_BINGET are space-optimized
       versions.
       """),
diff --git a/Lib/platform.py b/Lib/platform.py
index de81b63e32db..b01568ca617d 100755
--- a/Lib/platform.py
+++ b/Lib/platform.py
@@ -498,7 +498,7 @@ def _syscmd_ver(system='', release='', version='',
             info = pipe.read()
             if pipe.close():
                 raise os.error('command failed')
-            # XXX How can I supress shell errors from being written
+            # XXX How can I suppress shell errors from being written
             #     to stderr ?
         except os.error as why:
             #print 'Command %s failed: %s' % (cmd,why)
diff --git a/Lib/subprocess.py b/Lib/subprocess.py
index c02fb525ec57..477f92782100 100644
--- a/Lib/subprocess.py
+++ b/Lib/subprocess.py
@@ -947,7 +947,7 @@ class Popen(object):
             except pywintypes.error as e:
                 # Translate pywintypes.error to WindowsError, which is
                 # a subclass of OSError.  FIXME: We should really
-                # translate errno using _sys_errlist (or simliar), but
+                # translate errno using _sys_errlist (or similar), but
                 # how can this be done from Python?
                 raise WindowsError(*e.args)
             finally:
diff --git a/Lib/test/datetimetester.py b/Lib/test/datetimetester.py
index 4b5c890cdde3..e9ceee6d9616 100644
--- a/Lib/test/datetimetester.py
+++ b/Lib/test/datetimetester.py
@@ -3414,7 +3414,7 @@ class TestTimezoneConversions(unittest.TestCase):
             self.assertEqual(dt, there_and_back)
 
         # Because we have a redundant spelling when DST begins, there is
-        # (unforunately) an hour when DST ends that can't be spelled at all in
+        # (unfortunately) an hour when DST ends that can't be spelled at all in
         # local time.  When DST ends, the clock jumps from 1:59 back to 1:00
         # again.  The hour 1:MM DST has no spelling then:  1:MM is taken to be
         # standard time.  1:MM DST == 0:MM EST, but 0:MM is taken to be
diff --git a/Lib/test/pyclbr_input.py b/Lib/test/pyclbr_input.py
index 8efc9de75d77..19ccd62dead8 100644
--- a/Lib/test/pyclbr_input.py
+++ b/Lib/test/pyclbr_input.py
@@ -19,7 +19,7 @@ class C (B):
 
     # XXX: This causes test_pyclbr.py to fail, but only because the
     #      introspection-based is_method() code in the test can't
-    #      distinguish between this and a geniune method function like m().
+    #      distinguish between this and a genuine method function like m().
     #      The pyclbr.py module gets this right as it parses the text.
     #
     #f = f
diff --git a/Lib/test/test_capi.py b/Lib/test/test_capi.py
index 529a2a5e1630..f9133474e118 100644
--- a/Lib/test/test_capi.py
+++ b/Lib/test/test_capi.py
@@ -127,7 +127,7 @@ class TestPendingCalls(unittest.TestCase):
                 context.event.set()
 
     def test_pendingcalls_non_threaded(self):
-        #again, just using the main thread, likely they will all be dispathced at
+        #again, just using the main thread, likely they will all be dispatched at
         #once.  It is ok to ask for too many, because we loop until we find a slot.
         #the loop can be interrupted to dispatch.
         #there are only 32 dispatch slots, so we go for twice that!
diff --git a/Lib/test/test_decimal.py b/Lib/test/test_decimal.py
index 8f1f8638ff61..e46cd91e5e32 100644
--- a/Lib/test/test_decimal.py
+++ b/Lib/test/test_decimal.py
@@ -228,7 +228,7 @@ class DecimalTest(unittest.TestCase):
                 try:
                     t = self.eval_line(line)
                 except DecimalException as exception:
-                    #Exception raised where there shoudn't have been one.
+                    #Exception raised where there shouldn't have been one.
                     self.fail('Exception "'+exception.__class__.__name__ + '" raised on line '+line)
 
         return
diff --git a/Lib/test/test_descr.py b/Lib/test/test_descr.py
index 0e2f3898418c..41dfa70e553f 100644
--- a/Lib/test/test_descr.py
+++ b/Lib/test/test_descr.py
@@ -3967,7 +3967,7 @@ order (MRO) for bases """
         except TypeError:
             pass
         else:
-            self.fail("Carlo Verre __setattr__ suceeded!")
+            self.fail("Carlo Verre __setattr__ succeeded!")
         try:
             object.__delattr__(str, "lower")
         except TypeError:
diff --git a/Lib/test/test_doctest.py b/Lib/test/test_doctest.py
index 484a9b8468a6..13836bafa066 100644
--- a/Lib/test/test_doctest.py
+++ b/Lib/test/test_doctest.py
@@ -1296,7 +1296,7 @@ marking, as well as interline differences.
         ?     +              ++    ^
     TestResults(failed=1, attempted=1)
 
-The REPORT_ONLY_FIRST_FAILURE supresses result output after the first
+The REPORT_ONLY_FIRST_FAILURE suppresses result output after the first
 failing example:
 
     >>> def f(x):
@@ -1326,7 +1326,7 @@ failing example:
         2
     TestResults(failed=3, attempted=5)
 
-However, output from `report_start` is not supressed:
+However, output from `report_start` is not suppressed:
 
     >>> doctest.DocTestRunner(verbose=True, optionflags=flags).run(test)
     ... # doctest: +ELLIPSIS
@@ -2276,7 +2276,7 @@ We don't want `-v` in sys.argv for these tests.
     >>> doctest.master = None  # Reset master.
 
 (Note: we'll be clearing doctest.master after each call to
-`doctest.testfile`, to supress warnings about multiple tests with the
+`doctest.testfile`, to suppress warnings about multiple tests with the
 same name.)
 
 Globals may be specified with the `globs` and `extraglobs` parameters:
@@ -2312,7 +2312,7 @@ optional `module_relative` parameter:
     TestResults(failed=0, attempted=2)
     >>> doctest.master = None  # Reset master.
 
-Verbosity can be increased with the optional `verbose` paremter:
+Verbosity can be increased with the optional `verbose` parameter:
 
     >>> doctest.testfile('test_doctest.txt', globs=globs, verbose=True)
     Trying:
@@ -2349,7 +2349,7 @@ parameter:
     TestResults(failed=1, attempted=2)
     >>> doctest.master = None  # Reset master.
 
-The summary report may be supressed with the optional `report`
+The summary report may be suppressed with the optional `report`
 parameter:
 
     >>> doctest.testfile('test_doctest.txt', report=False)
diff --git a/Lib/test/test_extcall.py b/Lib/test/test_extcall.py
index c31e92095485..1f7f63042e76 100644
--- a/Lib/test/test_extcall.py
+++ b/Lib/test/test_extcall.py
@@ -228,7 +228,7 @@ Another helper function
     >>> Foo.method(1, *[2, 3])
     5
 
-A PyCFunction that takes only positional parameters shoud allow an
+A PyCFunction that takes only positional parameters should allow an
 empty keyword dictionary to pass without a complaint, but raise a
 TypeError if te dictionary is not empty
 
diff --git a/Lib/test/test_float.py b/Lib/test/test_float.py
index 30cb4b91674c..1968b8ae78e6 100644
--- a/Lib/test/test_float.py
+++ b/Lib/test/test_float.py
@@ -67,7 +67,7 @@ class GeneralFloatCases(unittest.TestCase):
     def test_float_with_comma(self):
         # set locale to something that doesn't use '.' for the decimal point
         # float must not accept the locale specific decimal point but
-        # it still has to accept the normal python syntac
+        # it still has to accept the normal python syntax
         import locale
         if not locale.localeconv()['decimal_point'] == ',':
             return
@@ -189,7 +189,7 @@ class GeneralFloatCases(unittest.TestCase):
     def assertEqualAndEqualSign(self, a, b):
         # fail unless a == b and a and b have the same sign bit;
         # the only difference from assertEqual is that this test
-        # distingishes -0.0 and 0.0.
+        # distinguishes -0.0 and 0.0.
         self.assertEqual((a, copysign(1.0, a)), (b, copysign(1.0, b)))
 
     @support.requires_IEEE_754
diff --git a/Lib/test/test_grammar.py b/Lib/test/test_grammar.py
index 05a036af2eac..329b25807f66 100644
--- a/Lib/test/test_grammar.py
+++ b/Lib/test/test_grammar.py
@@ -350,7 +350,7 @@ class GrammarTests(unittest.TestCase):
         ### simple_stmt: small_stmt (';' small_stmt)* [';']
         x = 1; pass; del x
         def foo():
-            # verify statments that end with semi-colons
+            # verify statements that end with semi-colons
             x = 1; pass; del x;
         foo()
 
diff --git a/Lib/test/test_httpservers.py b/Lib/test/test_httpservers.py
index 95b9c19d12a8..a16e0e32b883 100644
--- a/Lib/test/test_httpservers.py
+++ b/Lib/test/test_httpservers.py
@@ -462,7 +462,7 @@ class RejectingSocketlessRequestHandler(SocketlessRequestHandler):
         return False
 
 class BaseHTTPRequestHandlerTestCase(unittest.TestCase):
-    """Test the functionaility of the BaseHTTPServer.
+    """Test the functionality of the BaseHTTPServer.
 
        Test the support for the Expect 100-continue header.
        """
diff --git a/Lib/test/test_iterlen.py b/Lib/test/test_iterlen.py
index cd928013f567..7469a319f7a3 100644
--- a/Lib/test/test_iterlen.py
+++ b/Lib/test/test_iterlen.py
@@ -20,11 +20,11 @@ This is the case for tuples, range objects, and itertools.repeat().
 
 Some containers become temporarily immutable during iteration.  This includes
 dicts, sets, and collections.deque.  Their implementation is equally simple
-though they need to permantently set their length to zero whenever there is
+though they need to permanently set their length to zero whenever there is
 an attempt to iterate after a length mutation.
 
 The situation slightly more involved whenever an object allows length mutation
-during iteration.  Lists and sequence iterators are dynanamically updatable.
+during iteration.  Lists and sequence iterators are dynamically updatable.
 So, if a list is extended during iteration, the iterator will continue through
 the new items.  If it shrinks to a point before the most recent iteration,
 then no further items are available and the length is reported at zero.
diff --git a/Lib/test/test_itertools.py b/Lib/test/test_itertools.py
index b744636551ff..5e4bf1ba8917 100644
--- a/Lib/test/test_itertools.py
+++ b/Lib/test/test_itertools.py
@@ -1526,7 +1526,7 @@ Samuele
 ...     return chain(iterable, repeat(None))
 
 >>> def ncycles(iterable, n):
-...     "Returns the seqeuence elements n times"
+...     "Returns the sequence elements n times"
 ...     return chain(*repeat(iterable, n))
 
 >>> def dotproduct(vec1, vec2):
diff --git a/Lib/test/test_marshal.py b/Lib/test/test_marshal.py
index f9b19007d1bb..81cf598402a8 100644
--- a/Lib/test/test_marshal.py
+++ b/Lib/test/test_marshal.py
@@ -194,7 +194,7 @@ class BugsTestCase(unittest.TestCase):
         #   >>> type(loads(dumps(Int())))
         #   <type 'int'>
         for typ in (int, float, complex, tuple, list, dict, set, frozenset):
-            # Note: str sublclasses are not tested because they get handled
+            # Note: str subclasses are not tested because they get handled
             # by marshal's routines for objects supporting the buffer API.
             subtyp = type('subtyp', (typ,), {})
             self.assertRaises(ValueError, marshal.dumps, subtyp())
diff --git a/Lib/test/test_math.py b/Lib/test/test_math.py
index c72383a2a4ca..dddc889375cf 100644
--- a/Lib/test/test_math.py
+++ b/Lib/test/test_math.py
@@ -820,7 +820,7 @@ class MathTests(unittest.TestCase):
 
         # the following tests have been commented out since they don't
         # really belong here:  the implementation of ** for floats is
-        # independent of the implemention of math.pow
+        # independent of the implementation of math.pow
         #self.assertEqual(1**NAN, 1)
         #self.assertEqual(1**INF, 1)
         #self.assertEqual(1**NINF, 1)
diff --git a/Lib/test/test_mmap.py b/Lib/test/test_mmap.py
index 9b7100d7a29f..e62a046c0112 100644
--- a/Lib/test/test_mmap.py
+++ b/Lib/test/test_mmap.py
@@ -594,7 +594,7 @@ class MmapTests(unittest.TestCase):
             m2.close()
             m1.close()
 
-            # Test differnt tag
+            # Test different tag
             m1 = mmap.mmap(-1, len(data1), tagname="foo")
             m1[:] = data1
             m2 = mmap.mmap(-1, len(data2), tagname="boo")
diff --git a/Lib/test/test_multiprocessing.py b/Lib/test/test_multiprocessing.py
index 465a83102e31..91e2cbb02718 100644
--- a/Lib/test/test_multiprocessing.py
+++ b/Lib/test/test_multiprocessing.py
@@ -783,7 +783,7 @@ class _TestEvent(BaseTestCase):
         event = self.Event()
         wait = TimingWrapper(event.wait)
 
-        # Removed temporaily, due to API shear, this does not
+        # Removed temporarily, due to API shear, this does not
         # work with threading._Event objects. is_set == isSet
         self.assertEqual(event.is_set(), False)
 
@@ -1753,7 +1753,7 @@ class _TestFinalize(BaseTestCase):
 
         util.Finalize(None, conn.send, args=('STOP',), exitpriority=-100)
 
-        # call mutliprocessing's cleanup function then exit process without
+        # call multiprocessing's cleanup function then exit process without
         # garbage collecting locals
         util._exit_function()
         conn.close()
diff --git a/Lib/test/test_pkg.py b/Lib/test/test_pkg.py
index a342f7a7aeee..a4ddb15875c7 100644
--- a/Lib/test/test_pkg.py
+++ b/Lib/test/test_pkg.py
@@ -56,7 +56,7 @@ class TestPkg(unittest.TestCase):
         if self.root: # Only clean if the test was actually run
             cleanout(self.root)
 
-        # delete all modules concerning the tested hiearchy
+        # delete all modules concerning the tested hierarchy
         if self.pkgname:
             modules = [name for name in sys.modules
                        if self.pkgname in name.split('.')]
diff --git a/Lib/test/test_print.py b/Lib/test/test_print.py
index ad714625ac21..8d37bbc4d616 100644
--- a/Lib/test/test_print.py
+++ b/Lib/test/test_print.py
@@ -20,7 +20,7 @@ NotDefined = object()
 # A dispatch table all 8 combinations of providing
 #  sep, end, and file
 # I use this machinery so that I'm not just passing default
-#  values to print, I'm eiher passing or not passing in the
+#  values to print, I'm either passing or not passing in the
 #  arguments
 dispatch = {
     (False, False, False):
diff --git a/Lib/test/test_strlit.py b/Lib/test/test_strlit.py
index 23d96f867a85..9eb30e9c54b6 100644
--- a/Lib/test/test_strlit.py
+++ b/Lib/test/test_strlit.py
@@ -22,7 +22,7 @@ We have to test this with various file encodings.  We also test it with
 exec()/eval(), which uses a different code path.
 
 This file is really about correct treatment of encodings and
-backslashes.  It doens't concern itself with issues like single
+backslashes.  It doesn't concern itself with issues like single
 vs. double quotes or singly- vs. triply-quoted strings: that's dealt
 with elsewhere (I assume).
 """
diff --git a/Lib/test/test_strptime.py b/Lib/test/test_strptime.py
index 77d37890a42c..89c08ede7b5d 100644
--- a/Lib/test/test_strptime.py
+++ b/Lib/test/test_strptime.py
@@ -536,7 +536,7 @@ class CacheTests(unittest.TestCase):
                 self.assertIsNot(first_time_re, second_time_re)
             # Possible test locale is not supported while initial locale is.
             # If this is the case just suppress the exception and fall-through
-            # to the reseting to the original locale.
+            # to the resetting to the original locale.
             except locale.Error:
                 pass
         # Make sure we don't trample on the locale setting once we leave the
diff --git a/Lib/test/test_struct.py b/Lib/test/test_struct.py
index 9a9da377c132..2ccaad29c08f 100644
--- a/Lib/test/test_struct.py
+++ b/Lib/test/test_struct.py
@@ -463,7 +463,7 @@ class StructTest(unittest.TestCase):
                           test_string)
 
     def test_unpack_with_buffer(self):
-        # SF bug 1563759: struct.unpack doens't support buffer protocol objects
+        # SF bug 1563759: struct.unpack doesn't support buffer protocol objects
         data1 = array.array('B', b'\x12\x34\x56\x78')
         data2 = memoryview(b'\x12\x34\x56\x78') # XXX b'......XXXX......', 6, 4
         for data in [data1, data2]:
diff --git a/Lib/test/test_syntax.py b/Lib/test/test_syntax.py
index cd6b9a57f95a..02372baf827d 100644
--- a/Lib/test/test_syntax.py
+++ b/Lib/test/test_syntax.py
@@ -237,7 +237,7 @@ SyntaxError: can't assign to function call
 
 Test continue in finally in weird combinations.
 
-continue in for loop under finally shouuld be ok.
+continue in for loop under finally should be ok.
 
     >>> def test():
     ...     try:
diff --git a/Lib/test/test_sys.py b/Lib/test/test_sys.py
index d37651efba44..db27cdf347c7 100644
--- a/Lib/test/test_sys.py
+++ b/Lib/test/test_sys.py
@@ -491,7 +491,7 @@ class SysModuleTest(unittest.TestCase):
         # provide too much opportunity for insane things to happen.
         # We don't want them in the interned dict and if they aren't
         # actually interned, we don't want to create the appearance
-        # that they are by allowing intern() to succeeed.
+        # that they are by allowing intern() to succeed.
         class S(str):
             def __hash__(self):
                 return 123
diff --git a/Lib/test/test_threading.py b/Lib/test/test_threading.py
index ecbbdbf56f68..5f99b2ea9f59 100644
--- a/Lib/test/test_threading.py
+++ b/Lib/test/test_threading.py
@@ -570,7 +570,7 @@ class ThreadJoinOnShutdown(BaseTestCase):
             # This acquires the lock and then waits until the child has forked
             # before returning, which will release the lock soon after.  If
             # someone else tries to fix this test case by acquiring this lock
-            # before forking instead of reseting it, the test case will
+            # before forking instead of resetting it, the test case will
             # deadlock when it shouldn't.
             condition = w._block
             orig_acquire = condition.acquire
diff --git a/Lib/test/test_trace.py b/Lib/test/test_trace.py
index 93df84f57cbf..461d1d8e6a42 100644
--- a/Lib/test/test_trace.py
+++ b/Lib/test/test_trace.py
@@ -207,7 +207,7 @@ class TestRunExecCounts(unittest.TestCase):
             (self.my_py_filename, firstlineno + 4): 1,
         }
 
-        # When used through 'run', some other spurios counts are produced, like
+        # When used through 'run', some other spurious counts are produced, like
         # the settrace of threading, which we ignore, just making sure that the
         # counts fo traced_func_loop were right.
         #
diff --git a/Lib/test/test_urllib.py b/Lib/test/test_urllib.py
index 3003331416f4..673afc42a69a 100644
--- a/Lib/test/test_urllib.py
+++ b/Lib/test/test_urllib.py
@@ -1021,7 +1021,7 @@ class URLopener_Tests(unittest.TestCase):
 
 # Just commented them out.
 # Can't really tell why keep failing in windows and sparc.
-# Everywhere else they work ok, but on those machines, someteimes
+# Everywhere else they work ok, but on those machines, sometimes
 # fail in one of the tests, sometimes in other. I have a linux, and
 # the tests go ok.
 # If anybody has one of the problematic enviroments, please help!
diff --git a/Lib/test/test_warnings.py b/Lib/test/test_warnings.py
index c8865fe6245a..dbf30e985c0a 100644
--- a/Lib/test/test_warnings.py
+++ b/Lib/test/test_warnings.py
@@ -332,7 +332,7 @@ class WarnTests(unittest.TestCase):
             sys.argv = argv
 
     def test_warn_explicit_type_errors(self):
-        # warn_explicit() shoud error out gracefully if it is given objects
+        # warn_explicit() should error out gracefully if it is given objects
         # of the wrong types.
         # lineno is expected to be an integer.
         self.assertRaises(TypeError, self.module.warn_explicit,
diff --git a/Lib/tkinter/test/test_ttk/test_functions.py b/Lib/tkinter/test/test_ttk/test_functions.py
index f9b908e5e48e..df593cd71092 100644
--- a/Lib/tkinter/test/test_ttk/test_functions.py
+++ b/Lib/tkinter/test/test_ttk/test_functions.py
@@ -135,7 +135,7 @@ class InternalFunctionsTest(unittest.TestCase):
         # minimum acceptable for image type
         self.assertEqual(ttk._format_elemcreate('image', False, 'test'),
             ("test ", ()))
-        # specifiyng a state spec
+        # specifying a state spec
         self.assertEqual(ttk._format_elemcreate('image', False, 'test',
             ('', 'a')), ("test {} a", ()))
         # state spec with multiple states
diff --git a/Lib/tkinter/tix.py b/Lib/tkinter/tix.py
index 17ed230da74b..be44a09e33d5 100644
--- a/Lib/tkinter/tix.py
+++ b/Lib/tkinter/tix.py
@@ -171,7 +171,7 @@ class tixCommand:
         return self.tk.call('tix', 'getimage', name)
 
     def tix_option_get(self, name):
-        """Gets  the options  manitained  by  the  Tix
+        """Gets  the options  maintained  by  the  Tix
         scheme mechanism. Available options include:
 
             active_bg       active_fg      bg
@@ -576,7 +576,7 @@ class ButtonBox(TixWidget):
 
 class ComboBox(TixWidget):
     """ComboBox - an Entry field with a dropdown menu. The user can select a
-    choice by either typing in the entry subwdget or selecting from the
+    choice by either typing in the entry subwidget or selecting from the
     listbox subwidget.
 
     Subwidget       Class
@@ -869,7 +869,7 @@ class HList(TixWidget, XView, YView):
     """HList - Hierarchy display  widget can be used to display any data
     that have a hierarchical structure, for example, file system directory
     trees. The list entries are indented and connected by branch lines
-    according to their places in the hierachy.
+    according to their places in the hierarchy.
 
     Subwidgets - None"""
 
@@ -1519,7 +1519,7 @@ class TList(TixWidget, XView, YView):
         self.tk.call(self._w, 'selection', 'set', first, last)
 
 class Tree(TixWidget):
-    """Tree - The tixTree widget can be used to display hierachical
+    """Tree - The tixTree widget can be used to display hierarchical
     data in a tree form. The user can adjust
     the view of the tree by opening or closing parts of the tree."""
 
diff --git a/Lib/tkinter/ttk.py b/Lib/tkinter/ttk.py
index 0d048bb468a4..1a6a9f46d028 100644
--- a/Lib/tkinter/ttk.py
+++ b/Lib/tkinter/ttk.py
@@ -707,7 +707,7 @@ class Combobox(Entry):
             textvariable, values, width
         """
         # The "values" option may need special formatting, so leave to
-        # _format_optdict the responsability to format it
+        # _format_optdict the responsibility to format it
         if "values" in kw:
             kw["values"] = _format_optdict({'v': kw["values"]})[1]
 
diff --git a/Lib/turtle.py b/Lib/turtle.py
index e1fc8c59b07b..2ff54278e2f9 100644
--- a/Lib/turtle.py
+++ b/Lib/turtle.py
@@ -1488,7 +1488,7 @@ class TurtleScreen(TurtleScreenBase):
         Optional arguments:
         canvwidth -- positive integer, new width of canvas in pixels
         canvheight --  positive integer, new height of canvas in pixels
-        bg -- colorstring or color-tupel, new backgroundcolor
+        bg -- colorstring or color-tuple, new backgroundcolor
         If no arguments are given, return current (canvaswidth, canvasheight)
 
         Do not alter the drawing window. To observe hidden parts of
@@ -3242,9 +3242,9 @@ class RawTurtle(TPen, TNavigator):
                                                fill="", width=ps)
         # Turtle now at position old,
         self._position = old
-        ##  if undo is done during crating a polygon, the last vertex
-        ##  will be deleted. if the polygon is entirel deleted,
-        ##  creatigPoly will be set to False.
+        ##  if undo is done during creating a polygon, the last vertex
+        ##  will be deleted. if the polygon is entirely deleted,
+        ##  creatingPoly will be set to False.
         ##  Polygons created before the last one will not be affected by undo()
         if self._creatingPoly:
             if len(self._poly) > 0:
@@ -3796,7 +3796,7 @@ class _Screen(TurtleScreen):
 
 
 class Turtle(RawTurtle):
-    """RawTurtle auto-crating (scrolled) canvas.
+    """RawTurtle auto-creating (scrolled) canvas.
 
     When a Turtle object is created or a function derived from some
     Turtle method is called a TurtleScreen object is automatically created.
@@ -3836,7 +3836,7 @@ def write_docstringdict(filename="turtle_docstringdict"):
     filename -- a string, used as filename
                 default value is turtle_docstringdict
 
-    Has to be called explicitely, (not used by the turtle-graphics classes)
+    Has to be called explicitly, (not used by the turtle-graphics classes)
     The docstring dictionary will be written to the Python script <filname>.py
     It is intended to serve as a template for translation of the docstrings
     into different languages.
diff --git a/Lib/turtledemo/bytedesign.py b/Lib/turtledemo/bytedesign.py
index 96118b32df2b..64b1d7d5b032 100644
--- a/Lib/turtledemo/bytedesign.py
+++ b/Lib/turtledemo/bytedesign.py
@@ -4,7 +4,7 @@
         tdemo_bytedesign.py
 
 An example adapted from the example-suite
-of PythonCard's turtle graphcis.
+of PythonCard's turtle graphics.
 
 It's based on an article in BYTE magazine
 Problem Solving with Logo: Using Turtle
diff --git a/Lib/xml/dom/minicompat.py b/Lib/xml/dom/minicompat.py
index 2e6cc7e34c0a..62725c6198d0 100644
--- a/Lib/xml/dom/minicompat.py
+++ b/Lib/xml/dom/minicompat.py
@@ -6,7 +6,7 @@
 #
 #   NodeList      -- lightest possible NodeList implementation
 #
-#   EmptyNodeList -- lightest possible NodeList that is guarateed to
+#   EmptyNodeList -- lightest possible NodeList that is guaranteed to
 #                    remain empty (immutable)
 #
 #   StringTypes   -- tuple of defined string types
diff --git a/Lib/xml/dom/minidom.py b/Lib/xml/dom/minidom.py
index 53c29a5f8dd6..218c62ed5fb4 100644
--- a/Lib/xml/dom/minidom.py
+++ b/Lib/xml/dom/minidom.py
@@ -1905,7 +1905,7 @@ def _clone_node(node, deep, newOwnerDocument):
                     e._call_user_data_handler(operation, n, entity)
     else:
         # Note the cloning of Document and DocumentType nodes is
-        # implemenetation specific.  minidom handles those cases
+        # implementation specific.  minidom handles those cases
         # directly in the cloneNode() methods.
         raise xml.dom.NotSupportedErr("Cannot clone node %s" % repr(node))
 
diff --git a/Lib/xmlrpc/server.py b/Lib/xmlrpc/server.py
index 65f87d9541ad..947730961781 100644
--- a/Lib/xmlrpc/server.py
+++ b/Lib/xmlrpc/server.py
@@ -240,7 +240,7 @@ class SimpleXMLRPCDispatcher:
         marshalled data. For backwards compatibility, a dispatch
         function can be provided as an argument (see comment in
         SimpleXMLRPCRequestHandler.do_POST) but overriding the
-        existing method through subclassing is the prefered means
+        existing method through subclassing is the preferred means
         of changing method dispatch behavior.
         """
 
diff --git a/Mac/BuildScript/build-installer.py b/Mac/BuildScript/build-installer.py
index 0a0c0d6e5d32..ba920127c423 100755
--- a/Mac/BuildScript/build-installer.py
+++ b/Mac/BuildScript/build-installer.py
@@ -362,7 +362,7 @@ def fileContents(fn):
 
 def runCommand(commandline):
     """
-    Run a command and raise RuntimeError if it fails. Output is surpressed
+    Run a command and raise RuntimeError if it fails. Output is suppressed
     unless the command fails.
     """
     fd = os.popen(commandline, 'r')
diff --git a/Modules/_ctypes/_ctypes.c b/Modules/_ctypes/_ctypes.c
index ff35862cb3d0..f613613cd642 100644
--- a/Modules/_ctypes/_ctypes.c
+++ b/Modules/_ctypes/_ctypes.c
@@ -3317,7 +3317,7 @@ PyCFuncPtr_new(PyTypeObject *type, PyObject *args, PyObject *kwds)
     /* XXX XXX This would allow to pass additional options.  For COM
        method *implementations*, we would probably want different
        behaviour than in 'normal' callback functions: return a HRESULT if
-       an exception occurrs in the callback, and print the traceback not
+       an exception occurs in the callback, and print the traceback not
        only on the console, but also to OutputDebugString() or something
        like that.
     */
diff --git a/Modules/_ctypes/callbacks.c b/Modules/_ctypes/callbacks.c
index 88dad956dc85..d23509fbe2c5 100644
--- a/Modules/_ctypes/callbacks.c
+++ b/Modules/_ctypes/callbacks.c
@@ -202,7 +202,7 @@ static void _CallPythonObject(void *mem,
             /* XXX XXX XX
                We have the problem that c_byte or c_short have dict->size of
                1 resp. 4, but these parameters are pushed as sizeof(int) bytes.
-               BTW, the same problem occurrs when they are pushed as parameters
+               BTW, the same problem occurs when they are pushed as parameters
             */
         } else if (dict) {
             /* Hm, shouldn't we use PyCData_AtAddress() or something like that instead? */
diff --git a/Modules/_ctypes/callproc.c b/Modules/_ctypes/callproc.c
index 3be270d1e424..1f3c1c01853a 100644
--- a/Modules/_ctypes/callproc.c
+++ b/Modules/_ctypes/callproc.c
@@ -29,7 +29,7 @@
 
   4. _ctypes_callproc is then called with the 'callargs' tuple.  _ctypes_callproc first
   allocates two arrays.  The first is an array of 'struct argument' items, the
-  second array has 'void *' entried.
+  second array has 'void *' entries.
 
   5. If 'converters' are present (converters is a sequence of argtypes'
   from_param methods), for each item in 'callargs' converter is called and the
diff --git a/Modules/_functoolsmodule.c b/Modules/_functoolsmodule.c
index bb2f37b05e32..d8a283bcec6c 100644
--- a/Modules/_functoolsmodule.c
+++ b/Modules/_functoolsmodule.c
@@ -242,7 +242,7 @@ partial_repr(partialobject *pto)
    __reduce__ by itself doesn't support getting kwargs in the unpickle
    operation so we define a __setstate__ that replaces all the information
    about the partial.  If we only replaced part of it someone would use
-   it as a hook to do stange things.
+   it as a hook to do strange things.
  */
 
 static PyObject *
diff --git a/Modules/_io/iobase.c b/Modules/_io/iobase.c
index 9b58137fb905..ec7a2429295b 100644
--- a/Modules/_io/iobase.c
+++ b/Modules/_io/iobase.c
@@ -50,7 +50,7 @@ PyDoc_STRVAR(iobase_doc,
     "stream.\n"
     "\n"
     "IOBase also supports the :keyword:`with` statement. In this example,\n"
-    "fp is closed after the suite of the with statment is complete:\n"
+    "fp is closed after the suite of the with statement is complete:\n"
     "\n"
     "with open('spam.txt', 'r') as fp:\n"
     "    fp.write('Spam and eggs!')\n");
diff --git a/Modules/_io/stringio.c b/Modules/_io/stringio.c
index 5bb80cb050d9..c9d14b114b18 100644
--- a/Modules/_io/stringio.c
+++ b/Modules/_io/stringio.c
@@ -157,7 +157,7 @@ write_str(stringio *self, PyObject *obj)
           0   lo      string_size                           hi
           |   |<---used--->|<----------available----------->|
           |   |            <--to pad-->|<---to write--->    |
-          0   buf                   positon
+          0   buf                   position
 
         */
         memset(self->buf + self->string_size, '\0',
diff --git a/Modules/_pickle.c b/Modules/_pickle.c
index fb6281ee3a72..e13d8742ca18 100644
--- a/Modules/_pickle.c
+++ b/Modules/_pickle.c
@@ -6242,7 +6242,7 @@ initmodule(void)
         goto error;
     if (!PyDict_CheckExact(name_mapping_3to2)) {
         PyErr_Format(PyExc_RuntimeError,
-                     "_compat_pickle.REVERSE_NAME_MAPPING shouldbe a dict, "
+                     "_compat_pickle.REVERSE_NAME_MAPPING should be a dict, "
                      "not %.200s", Py_TYPE(name_mapping_3to2)->tp_name);
         goto error;
     }
diff --git a/Modules/_sqlite/connection.h b/Modules/_sqlite/connection.h
index 468446d9142b..c8e2f7cbd2b2 100644
--- a/Modules/_sqlite/connection.h
+++ b/Modules/_sqlite/connection.h
@@ -55,7 +55,7 @@ typedef struct
     /* None for autocommit, otherwise a PyString with the isolation level */
     PyObject* isolation_level;
 
-    /* NULL for autocommit, otherwise a string with the BEGIN statment; will be
+    /* NULL for autocommit, otherwise a string with the BEGIN statement; will be
      * freed in connection destructor */
     char* begin_statement;
 
diff --git a/Modules/cmathmodule.c b/Modules/cmathmodule.c
index 986b241e29aa..3021cf0466a9 100644
--- a/Modules/cmathmodule.c
+++ b/Modules/cmathmodule.c
@@ -23,7 +23,7 @@
 /*
    CM_LARGE_DOUBLE is used to avoid spurious overflow in the sqrt, log,
    inverse trig and inverse hyperbolic trig functions.  Its log is used in the
-   evaluation of exp, cos, cosh, sin, sinh, tan, and tanh to avoid unecessary
+   evaluation of exp, cos, cosh, sin, sinh, tan, and tanh to avoid unnecessary
    overflow.
  */
 
diff --git a/Modules/socketmodule.c b/Modules/socketmodule.c
index 327e47092460..44eeeb7e2830 100644
--- a/Modules/socketmodule.c
+++ b/Modules/socketmodule.c
@@ -2242,7 +2242,7 @@ will allow before refusing new connections.");
  * This is the guts of the recv() and recv_into() methods, which reads into a
  * char buffer.  If you have any inc/dec ref to do to the objects that contain
  * the buffer, do it in the caller.  This function returns the number of bytes
- * succesfully read.  If there was an error, it returns -1.  Note that it is
+ * successfully read.  If there was an error, it returns -1.  Note that it is
  * also possible that we return a number of bytes smaller than the request
  * bytes.
  */
@@ -2446,7 +2446,7 @@ See recv() for documentation about the flags.");
  * This is the guts of the recvfrom() and recvfrom_into() methods, which reads
  * into a char buffer.  If you have any inc/def ref to do to the objects that
  * contain the buffer, do it in the caller.  This function returns the number
- * of bytes succesfully read.  If there was an error, it returns -1.  Note
+ * of bytes successfully read.  If there was an error, it returns -1.  Note
  * that it is also possible that we return a number of bytes smaller than the
  * request bytes.
  *
@@ -2541,9 +2541,9 @@ sock_recvfrom(PySocketSockObject *s, PyObject *args)
 
     if (outlen != recvlen) {
         /* We did not read as many bytes as we anticipated, resize the
-           string if possible and be succesful. */
+           string if possible and be successful. */
         if (_PyBytes_Resize(&buf, outlen) < 0)
-            /* Oopsy, not so succesful after all. */
+            /* Oopsy, not so successful after all. */
             goto finally;
     }
 
@@ -4337,7 +4337,7 @@ os_init(void)
 
     return 0;  /* Failure */
 #else
-    /* No need to initialise sockets with GCC/EMX */
+    /* No need to initialize sockets with GCC/EMX */
     return 1; /* Success */
 #endif
 }
@@ -4371,7 +4371,7 @@ PySocketModule_APIObject PySocketModuleAPI =
    "socket.py" which implements some additional functionality.
    The import of "_socket" may fail with an ImportError exception if
    os-specific initialization fails.  On Windows, this does WINSOCK
-   initialization.  When WINSOCK is initialized succesfully, a call to
+   initialization.  When WINSOCK is initialized successfully, a call to
    WSACleanup() is scheduled to be made at exit time.
 */
 
diff --git a/Modules/timemodule.c b/Modules/timemodule.c
index 3a12522050f2..86b73a575ac9 100644
--- a/Modules/timemodule.c
+++ b/Modules/timemodule.c
@@ -697,7 +697,7 @@ time_mktime(PyObject *self, PyObject *tup)
     buf.tm_wday = -1;  /* sentinel; original value ignored */
     tt = mktime(&buf);
     /* Return value of -1 does not necessarily mean an error, but tm_wday
-     * cannot remain set to -1 if mktime succedded. */
+     * cannot remain set to -1 if mktime succeeded. */
     if (tt == (time_t)(-1) && buf.tm_wday == -1) {
         PyErr_SetString(PyExc_OverflowError,
                         "mktime argument out of range");
diff --git a/Modules/zipimport.c b/Modules/zipimport.c
index 6969fe3c3491..88a27c1d10f4 100644
--- a/Modules/zipimport.c
+++ b/Modules/zipimport.c
@@ -1120,7 +1120,7 @@ parse_dostime(int dostime, int dosdate)
 }
 
 /* Given a path to a .pyc or .pyo file in the archive, return the
-   modifictaion time of the matching .py file, or 0 if no source
+   modification time of the matching .py file, or 0 if no source
    is available. */
 static time_t
 get_mtime_of_source(ZipImporter *self, char *path)
diff --git a/Modules/zlib/deflate.h b/Modules/zlib/deflate.h
index cbf0d1ea5d96..442e14a21445 100644
--- a/Modules/zlib/deflate.h
+++ b/Modules/zlib/deflate.h
@@ -188,7 +188,7 @@ typedef struct internal_state {
     int nice_match; /* Stop searching when current match exceeds this */
 
                 /* used by trees.c: */
-    /* Didn't use ct_data typedef below to supress compiler warning */
+    /* Didn't use ct_data typedef below to suppress compiler warning */
     struct ct_data_s dyn_ltree[HEAP_SIZE];   /* literal and length tree */
     struct ct_data_s dyn_dtree[2*D_CODES+1]; /* distance tree */
     struct ct_data_s bl_tree[2*BL_CODES+1];  /* Huffman tree for bit lengths */
diff --git a/Modules/zlib/gzio.c b/Modules/zlib/gzio.c
index 7e90f4928fc0..5cf50e04c401 100644
--- a/Modules/zlib/gzio.c
+++ b/Modules/zlib/gzio.c
@@ -256,7 +256,7 @@ int ZEXPORT gzsetparams (file, level, strategy)
 /* ===========================================================================
      Read a byte from a gz_stream; update next_in and avail_in. Return EOF
    for end of file.
-   IN assertion: the stream s has been sucessfully opened for reading.
+   IN assertion: the stream s has been successfully opened for reading.
 */
 local int get_byte(s)
     gz_stream *s;
@@ -281,7 +281,7 @@ local int get_byte(s)
     mode to transparent if the gzip magic header is not present; set s->err
     to Z_DATA_ERROR if the magic header is present but the rest of the header
     is incorrect.
-    IN assertion: the stream s has already been created sucessfully;
+    IN assertion: the stream s has already been created successfully;
        s->stream.avail_in is zero for the first time, but may be non-zero
        for concatenated .gz files.
 */
diff --git a/Objects/dictobject.c b/Objects/dictobject.c
index df8d77f313d3..3fa5cc4b95bb 100644
--- a/Objects/dictobject.c
+++ b/Objects/dictobject.c
@@ -2080,7 +2080,7 @@ dict_new(PyTypeObject *type, PyObject *args, PyObject *kwds)
         assert(d->ma_table == NULL && d->ma_fill == 0 && d->ma_used == 0);
         INIT_NONZERO_DICT_SLOTS(d);
         d->ma_lookup = lookdict_unicode;
-        /* The object has been implicitely tracked by tp_alloc */
+        /* The object has been implicitly tracked by tp_alloc */
         if (type == &PyDict_Type)
             _PyObject_GC_UNTRACK(d);
 #ifdef SHOW_CONVERSION_COUNTS
diff --git a/Objects/listobject.c b/Objects/listobject.c
index 2e0c8aac0e60..18713abde11a 100644
--- a/Objects/listobject.c
+++ b/Objects/listobject.c
@@ -11,7 +11,7 @@
 /* Ensure ob_item has room for at least newsize elements, and set
  * ob_size to newsize.  If newsize > ob_size on entry, the content
  * of the new slots at exit is undefined heap trash; it's the caller's
- * responsiblity to overwrite them with sane values.
+ * responsibility to overwrite them with sane values.
  * The number of allocated elements may grow, shrink, or stay the same.
  * Failure is impossible if newsize <= self.allocated on entry, although
  * that partly relies on an assumption that the system realloc() never
diff --git a/Objects/longobject.c b/Objects/longobject.c
index 7c9506a8e95f..552f8f0b898c 100644
--- a/Objects/longobject.c
+++ b/Objects/longobject.c
@@ -709,7 +709,7 @@ _PyLong_FromByteArray(const unsigned char* bytes, size_t n,
         is_signed = *pendbyte >= 0x80;
 
     /* Compute numsignificantbytes.  This consists of finding the most
-       significant byte.  Leading 0 bytes are insignficant if the number
+       significant byte.  Leading 0 bytes are insignificant if the number
        is positive, and leading 0xff bytes if negative. */
     {
         size_t i;
diff --git a/Objects/typeobject.c b/Objects/typeobject.c
index 7a1aa77e3f7e..8eaf51fb3997 100644
--- a/Objects/typeobject.c
+++ b/Objects/typeobject.c
@@ -1008,7 +1008,7 @@ subtype_dealloc(PyObject *self)
           self has a refcount of 0, and if gc ever gets its hands on it
           (which can happen if any weakref callback gets invoked), it
           looks like trash to gc too, and gc also tries to delete self
-          then.  But we're already deleting self.  Double dealloction is
+          then.  But we're already deleting self.  Double deallocation is
           a subtle disaster.
 
        Q. Why the bizarre (net-zero) manipulation of
@@ -5937,7 +5937,7 @@ recurse_down_subclasses(PyTypeObject *type, PyObject *name,
    slots compete for the same descriptor (for example both sq_item and
    mp_subscript generate a __getitem__ descriptor).
 
-   In the latter case, the first slotdef entry encoutered wins.  Since
+   In the latter case, the first slotdef entry encountered wins.  Since
    slotdef entries are sorted by the offset of the slot in the
    PyHeapTypeObject, this gives us some control over disambiguating
    between competing slots: the members of PyHeapTypeObject are listed
diff --git a/PC/bdist_wininst/extract.c b/PC/bdist_wininst/extract.c
index fc2d2b970a12..c900f235fd91 100644
--- a/PC/bdist_wininst/extract.c
+++ b/PC/bdist_wininst/extract.c
@@ -54,7 +54,7 @@ BOOL ensure_directory(char *pathname, char *new_part, NOTIFYPROC notify)
     return TRUE;
 }
 
-/* XXX Should better explicitely specify
+/* XXX Should better explicitly specify
  * uncomp_size and file_times instead of pfhdr!
  */
 char *map_new_file(DWORD flags, char *filename,
@@ -164,7 +164,7 @@ extract_file(char *dst, char *src, int method, int comp_size,
         zstream.avail_out = uncomp_size;
 
 /* Apparently an undocumented feature of zlib: Set windowsize
-   to negative values to supress the gzip header and be compatible with
+   to negative values to suppress the gzip header and be compatible with
    zip! */
         result = TRUE;
         if (Z_OK != (x = inflateInit2(&zstream, -15))) {
diff --git a/PC/bdist_wininst/install.c b/PC/bdist_wininst/install.c
index 8601ddd9f5a3..771922cfd646 100644
--- a/PC/bdist_wininst/install.c
+++ b/PC/bdist_wininst/install.c
@@ -148,7 +148,7 @@ BOOL pyc_compile, pyo_compile;
    the permissions of the current user. */
 HKEY hkey_root = (HKEY)-1;
 
-BOOL success;                   /* Installation successfull? */
+BOOL success;                   /* Installation successful? */
 char *failure_reason = NULL;
 
 HANDLE hBitmap;
@@ -797,7 +797,7 @@ run_installscript(char *pathname, int argc, char **argv, char **pOutput)
 
     tempname = tempnam(NULL, NULL);
     // We use a static CRT while the Python version we load uses
-    // the CRT from one of various possibile DLLs.  As a result we
+    // the CRT from one of various possible DLLs.  As a result we
     // need to redirect the standard handles using the API rather
     // than the CRT.
     redirected = CreateFile(
diff --git a/PC/os2emx/dlfcn.c b/PC/os2emx/dlfcn.c
index 47c046ce7276..ebda9cd94b5e 100644
--- a/PC/os2emx/dlfcn.c
+++ b/PC/os2emx/dlfcn.c
@@ -188,7 +188,7 @@ inv_handle:
     return NULL;
 }
 
-/* free dynamicaly-linked library */
+/* free dynamically-linked library */
 int dlclose(void *handle)
 {
     int rc;
diff --git a/PC/os2emx/dlfcn.h b/PC/os2emx/dlfcn.h
index 49abecfbb537..f73ae6951331 100644
--- a/PC/os2emx/dlfcn.h
+++ b/PC/os2emx/dlfcn.h
@@ -42,7 +42,7 @@ void *dlopen(char *filename, int flags);
 /* return a pointer to the `symbol' in DLL */
 void *dlsym(void *handle, char *symbol);
 
-/* free dynamicaly-linked library */
+/* free dynamically-linked library */
 int dlclose(void *handle);
 
 /* return a string describing last occurred dl error */
diff --git a/Python/ceval.c b/Python/ceval.c
index f6d4b0b84ba1..43a5c904d1b8 100644
--- a/Python/ceval.c
+++ b/Python/ceval.c
@@ -26,7 +26,7 @@
 
 typedef unsigned long long uint64;
 
-/* PowerPC suppport.
+/* PowerPC support.
    "__ppc__" appears to be the preprocessor definition to detect on OS X, whereas
    "__powerpc__" appears to be the correct one for Linux with GCC
 */
@@ -1282,7 +1282,7 @@ PyEval_EvalFrameEx(PyFrameObject *f, int throwflag)
         if (_Py_atomic_load_relaxed(&eval_breaker)) {
             if (*next_instr == SETUP_FINALLY) {
                 /* Make the last opcode before
-                   a try: finally: block uninterruptable. */
+                   a try: finally: block uninterruptible. */
                 goto fast_next_opcode;
             }
             tstate->tick_counter++;
diff --git a/Python/pystate.c b/Python/pystate.c
index d5d98b0c6d6d..922e9a378029 100644
--- a/Python/pystate.c
+++ b/Python/pystate.c
@@ -512,7 +512,7 @@ _PyThread_CurrentFrames(void)
     /* for i in all interpreters:
      *     for t in all of i's thread states:
      *          if t's frame isn't NULL, map t's id to its frame
-     * Because these lists can mutute even when the GIL is held, we
+     * Because these lists can mutate even when the GIL is held, we
      * need to grab head_mutex for the duration.
      */
     HEAD_LOCK();
diff --git a/Python/thread.c b/Python/thread.c
index 09beaef79566..d224046e6471 100644
--- a/Python/thread.c
+++ b/Python/thread.c
@@ -40,7 +40,7 @@
 #endif
 
 /* Check if we're running on HP-UX and _SC_THREADS is defined. If so, then
-   enough of the Posix threads package is implimented to support python
+   enough of the Posix threads package is implemented to support python
    threads.
 
    This is valid for HP-UX 11.23 running on an ia64 system. If needed, add
diff --git a/Tools/freeze/checkextensions_win32.py b/Tools/freeze/checkextensions_win32.py
index ba3853c0be59..a41542f20ec9 100644
--- a/Tools/freeze/checkextensions_win32.py
+++ b/Tools/freeze/checkextensions_win32.py
@@ -7,7 +7,7 @@ I dont consider it worth parsing the MSVC makefiles for compiler options.  Even
 we get it just right, a specific freeze application may have specific compiler
 options anyway (eg, to enable or disable specific functionality)
 
-So my basic stragtegy is:
+So my basic strategy is:
 
 * Have some Windows INI files which "describe" one or more extension modules.
   (Freeze comes with a default one for all known modules - but you can specify
diff --git a/Tools/scripts/fixcid.py b/Tools/scripts/fixcid.py
index 95f7863b7ced..2d4cd1ab000a 100755
--- a/Tools/scripts/fixcid.py
+++ b/Tools/scripts/fixcid.py
@@ -188,7 +188,7 @@ def fix(filename):
     except os.error as msg:
         err(filename + ': rename failed (' + str(msg) + ')\n')
         return 1
-    # Return succes
+    # Return success
     return 0
 
 # Tokenizing ANSI C (partly)
diff --git a/Tools/unicode/makeunicodedata.py b/Tools/unicode/makeunicodedata.py
index 02b6892662e7..d50319024c40 100644
--- a/Tools/unicode/makeunicodedata.py
+++ b/Tools/unicode/makeunicodedata.py
@@ -1002,7 +1002,7 @@ class Hash:
                 poly = size + poly
                 break
         else:
-            raise AssertionError("ran out of polynominals")
+            raise AssertionError("ran out of polynomials")
 
         print(size, "slots in hash table")
 
diff --git a/setup.py b/setup.py
index 810559cf8da1..03b5eb75a01d 100644
--- a/setup.py
+++ b/setup.py
@@ -1017,8 +1017,8 @@ class PyBuildExt(build_ext):
             if sys.platform == 'darwin':
                 # 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 entiry path.
-                # This way a staticly linked custom sqlite gets picked up
+                # for dynamic libraries on the entire path.
+                # This way a statically linked custom sqlite gets picked up
                 # before the dynamic library in /usr/lib.
                 sqlite_extra_link_args = ('-Wl,-search_paths_first',)
             else: