diff --git a/Doc/library/io.rst b/Doc/library/io.rst
index 204b204..fdacabb 100644
--- a/Doc/library/io.rst
+++ b/Doc/library/io.rst
@@ -14,7 +14,7 @@
 
 At the top of the I/O hierarchy is the abstract base class :class:`IOBase`.  It
 defines the basic interface to a stream.  Note, however, that there is no
-seperation between reading and writing to streams; implementations are allowed
+separation between reading and writing to streams; implementations are allowed
 to throw an :exc:`IOError` if they do not support a given operation.
 
 Extending :class:`IOBase` is :class:`RawIOBase` which deals simply with the
@@ -612,7 +612,7 @@
    is enabled.  With this enabled, on input, the lines endings ``'\n'``,
    ``'\r'``, or ``'\r\n'`` are translated to ``'\n'`` before being returned to
    the caller.  Conversely, on output, ``'\n'`` is translated to the system
-   default line seperator, :data:`os.linesep`.  If *newline* is any other of its
+   default line separator, :data:`os.linesep`.  If *newline* is any other of its
    legal values, that newline becomes the newline when the file is read and it
    is returned untranslated.  On output, ``'\n'`` is converted to the *newline*.
 
diff --git a/Doc/library/pty.rst b/Doc/library/pty.rst
index ec1c75f..6579ef0 100644
--- a/Doc/library/pty.rst
+++ b/Doc/library/pty.rst
@@ -13,7 +13,7 @@
 concept: starting another process and being able to write to and read from its
 controlling terminal programmatically.
 
-Because pseudo-terminal handling is highly platform dependant, there is code to
+Because pseudo-terminal handling is highly platform dependent, there is code to
 do it only for SGI and Linux. (The Linux code is supposed to work on other
 platforms, but hasn't been tested yet.)
 
diff --git a/Doc/library/subprocess.rst b/Doc/library/subprocess.rst
index 9327f98..f4eafc4 100644
--- a/Doc/library/subprocess.rst
+++ b/Doc/library/subprocess.rst
@@ -181,9 +181,9 @@
    To capture standard error in the result, use stderr=subprocess.STDOUT.
 
       >>> subprocess.check_output(
-              ["/bin/sh", "-c", "ls non_existant_file ; exit 0"],
+              ["/bin/sh", "-c", "ls non_existent_file ; exit 0"],
               stderr=subprocess.STDOUT)
-      'ls: non_existant_file: No such file or directory\n'
+      'ls: non_existent_file: No such file or directory\n'
 
    .. versionadded:: 2.7