diff --git a/Include/datetime.h b/Include/datetime.h
index 41e3bcf865c..06cbc4abbd6 100644
--- a/Include/datetime.h
+++ b/Include/datetime.h
@@ -42,7 +42,7 @@ typedef struct
 
 typedef struct
 {
-    PyObject_HEAD               /* a pure abstract base clase */
+    PyObject_HEAD               /* a pure abstract base class */
 } PyDateTime_TZInfo;
 
 
diff --git a/Lib/collections/__init__.py b/Lib/collections/__init__.py
index e1a075c7585..0f19f30b4b2 100644
--- a/Lib/collections/__init__.py
+++ b/Lib/collections/__init__.py
@@ -372,7 +372,7 @@ def namedtuple(typename, field_names, verbose=False, rename=False):
         print(result._source)
 
     # For pickling to work, the __module__ variable needs to be set to the frame
-    # where the named tuple is created.  Bypass this step in enviroments where
+    # where the named tuple is created.  Bypass this step in environments where
     # sys._getframe is not defined (Jython for example) or sys._getframe is not
     # defined for arguments greater than 0 (IronPython).
     try:
diff --git a/Lib/test/datetimetester.py b/Lib/test/datetimetester.py
index e08b2dc24f0..49140a55264 100644
--- a/Lib/test/datetimetester.py
+++ b/Lib/test/datetimetester.py
@@ -250,7 +250,7 @@ class TestTimeZone(unittest.TestCase):
                              t.replace(tzinfo=tz).dst())
 
 #############################################################################
-# Base clase for testing a particular aspect of timedelta, time, date and
+# Base class for testing a particular aspect of timedelta, time, date and
 # datetime comparisons.
 
 class HarmlessMixedComparison:
diff --git a/Lib/test/test_ast.py b/Lib/test/test_ast.py
index 49daacb1eac..e69422a2927 100644
--- a/Lib/test/test_ast.py
+++ b/Lib/test/test_ast.py
@@ -22,7 +22,7 @@ def to_tuple(t):
 
 
 # These tests are compiled through "exec"
-# There should be atleast one test per statement
+# There should be at least one test per statement
 exec_tests = [
     # None
     "None",
diff --git a/Lib/test/test_http_cookiejar.py b/Lib/test/test_http_cookiejar.py
index 5575bffc9f4..143ac8a9363 100644
--- a/Lib/test/test_http_cookiejar.py
+++ b/Lib/test/test_http_cookiejar.py
@@ -374,7 +374,7 @@ class CookieTests(unittest.TestCase):
 ##   commas and equals are commonly appear in the cookie value). This also
 ##   means that if you fold multiple Set-Cookie header fields into one,
 ##   comma-separated list, it'll be a headache to parse (at least my head
-##   starts hurting everytime I think of that code).
+##   starts hurting every time I think of that code).
 ## - Expires: You'll get all sorts of date formats in the expires,
 ##   including emtpy expires attributes ("expires="). Be as flexible as you
 ##   can, and certainly don't expect the weekday to be there; if you can't
diff --git a/Lib/test/test_normalization.py b/Lib/test/test_normalization.py
index db28e1aeb81..ab2eeb77da0 100644
--- a/Lib/test/test_normalization.py
+++ b/Lib/test/test_normalization.py
@@ -59,7 +59,7 @@ class NormalizationTest(unittest.TestCase):
                 c1,c2,c3,c4,c5 = [unistr(x) for x in line.split(';')[:-1]]
             except RangeError:
                 # Skip unsupported characters;
-                # try atleast adding c1 if we are in part1
+                # try at least adding c1 if we are in part1
                 if part == "@Part1":
                     try:
                         c1 = unistr(line.split(';')[0])
diff --git a/Lib/test/test_urllib.py b/Lib/test/test_urllib.py
index b4b56d6d4ac..94f640b923c 100644
--- a/Lib/test/test_urllib.py
+++ b/Lib/test/test_urllib.py
@@ -1294,7 +1294,7 @@ class URLopener_Tests(unittest.TestCase):
 # 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!
+# If anybody has one of the problematic environments, please help!
 # .   Facundo
 #
 # def server(evt):
diff --git a/Misc/HISTORY b/Misc/HISTORY
index 83421cd47cb..4280764d18f 100644
--- a/Misc/HISTORY
+++ b/Misc/HISTORY
@@ -6903,7 +6903,7 @@ Library
 - Issue #1285086: Speed up urllib.parse functions: quote, quote_from_bytes,
   unquote, unquote_to_bytes.
 
-- Issue #8688: Distutils now recalculates MANIFEST everytime.
+- Issue #8688: Distutils now recalculates MANIFEST every time.
 
 - Issue #8477: ssl.RAND_egd() and ssl._test_decode_cert() support str with
   surrogates and bytes for the filename.
diff --git a/Modules/_ssl.c b/Modules/_ssl.c
index edda908f817..5021e1a48ff 100644
--- a/Modules/_ssl.c
+++ b/Modules/_ssl.c
@@ -1638,7 +1638,7 @@ static PyObject *PySSL_SSLshutdown(PySSLSocket *self)
          * Otherwise OpenSSL might read in too much data,
          * eating clear text data that happens to be
          * transmitted after the SSL shutdown.
-         * Should be safe to call repeatedly everytime this
+         * Should be safe to call repeatedly every time this
          * function is used and the shutdown_seen_zero != 0
          * condition is met.
          */
diff --git a/Modules/_winapi.c b/Modules/_winapi.c
index c34d2db2678..20d0063aaf4 100644
--- a/Modules/_winapi.c
+++ b/Modules/_winapi.c
@@ -491,7 +491,7 @@ getenvironment(PyObject* environment)
     Py_UCS4 *buffer = NULL, *p, *end;
     PyObject *keys, *values, *res;
 
-    /* convert environment dictionary to windows enviroment string */
+    /* convert environment dictionary to windows environment string */
     if (! PyMapping_Check(environment)) {
         PyErr_SetString(
             PyExc_TypeError, "environment must be dictionary or None");
diff --git a/Modules/unicodedata.c b/Modules/unicodedata.c
index 27fadb70197..d89316a3470 100644
--- a/Modules/unicodedata.c
+++ b/Modules/unicodedata.c
@@ -524,7 +524,7 @@ nfd_nfkd(PyObject *self, PyObject *input, int k)
         while(stackptr) {
             Py_UCS4 code = stack[--stackptr];
             /* Hangul Decomposition adds three characters in
-               a single step, so we need atleast that much room. */
+               a single step, so we need at least that much room. */
             if (space < 3) {
                 Py_UCS4 *new_output;
                 osize += 10;
diff --git a/PCbuild/readme.txt b/PCbuild/readme.txt
index 88690e9987c..fb4a456cf89 100644
--- a/PCbuild/readme.txt
+++ b/PCbuild/readme.txt
@@ -265,7 +265,7 @@ SDK, in particular the 64-bit support. This includes an Itanium compiler
 In addition, you need the Visual Studio plugin for external C compilers,
 from http://sf.net/projects/vsextcomp. The plugin will wrap cl.exe, to
 locate the proper target compiler, and convert compiler options
-accordingly. The project files require atleast version 0.9.
+accordingly. The project files require at least version 0.9.
 
 Building for AMD64
 ------------------