python
@@ -130,7 +130,7 @@ rather than dereferencing them through pointers.
 
 Please note, that these functions are :term:`soft deprecated` since Python
 3.15.  Avoid using this API in a new code to do complex arithmetic: either use
-the `Number Protocol <number>`_ API or use native complex types, like
+the :ref:`Number Protocol <number>` API or use native complex types, like
 :c:expr:`double complex`.
 
 

@@ -441,7 +441,7 @@ or subtracting from an empty counter.
 
    * Wikipedia entry for `Multisets <https://en.wikipedia.org/wiki/Multiset>`_.
 
-   * `C++ multisets <http://www.java2s.com/Tutorial/Cpp/0380__set-multiset/Catalog0380__set-multiset.htm>`_
+   * `C++ multisets <https://web.archive.org/web/20210108001926/http://www.java2s.com/Tutorial/Cpp/0380__set-multiset/Catalog0380__set-multiset.htm>`_
      tutorial with examples.
 
    * For mathematical operations on multisets and their use cases, see

@@ -757,7 +757,7 @@ Supported mailbox formats are Maildir, mbox, MH, Babyl, and MMDF.
    `nmh - Message Handling System <https://www.nongnu.org/nmh/>`_
       Home page of :program:`nmh`, an updated version of the original :program:`mh`.
 
-   `MH & nmh: Email for Users & Programmers <https://rand-mh.sourceforge.io/book/>`_
+   `MH & nmh: Email for Users & Programmers <https://web.mit.edu/daveg/SIPB/Info/Links/Documentation/mh-book/index.htm>`_
       A GPL-licensed book on :program:`mh` and :program:`nmh`, with some information
       on the mailbox format.
 

diff --git a/Doc/library/profile.rst b/Doc/library/profile.rst
@@ -4,7 +4,7 @@
 The Python Profilers
 ********************
 
-**Source code:** :source:`Lib/profile.py`, :source:`Lib/pstats.py`, and :source:`Lib/profile/sample.py`
+**Source code:** :source:`Lib/profile.py`, :source:`Lib/pstats.py`, and :source:`Lib/profiling/sampling/`
 
 --------------
 

diff --git a/Doc/library/secrets.rst b/Doc/library/secrets.rst
@@ -132,7 +132,7 @@ Other functions
    :term:`bytes-like objects <bytes-like object>`
    *a* and *b* are equal, otherwise ``False``,
    using a "constant-time compare" to reduce the risk of
-   `timing attacks <https://codahale.com/a-lesson-in-timing-attacks/>`_.
+   `timing attacks <https://en.wikipedia.org/wiki/Timing_attack>`_.
    See :func:`hmac.compare_digest` for additional details.
 
 

diff --git a/Doc/library/string.rst b/Doc/library/string.rst
@@ -4,7 +4,7 @@
 .. module:: string
    :synopsis: Common string operations.
 
-**Source code:** :source:`Lib/string.py`
+**Source code:** :source:`Lib/string/`
 
 --------------
 

diff --git a/Doc/library/tkinter.rst b/Doc/library/tkinter.rst
@@ -996,7 +996,7 @@ wherever the image was used.
 
 .. seealso::
 
-    The `Pillow <https://python-pillow.org/>`_ package adds support for
+    The `Pillow <https://python-pillow.github.io/>`_ package adds support for
     formats such as BMP, JPEG, TIFF, and WebP, among others.
 
 .. _tkinter-file-handlers:

@@ -1089,7 +1089,7 @@ See :source:`Mac/README.rst`.
 iOS Options
 -----------
 
-See :source:`iOS/README.rst`.
+See :source:`Apple/iOS/README.md`.
 
 .. option:: --enable-framework=INSTALLDIR
 

@@ -266,7 +266,7 @@ modules in your app, some additional steps will be required:
 Testing a Python package
 ------------------------
 
-The CPython source tree contains :source:`a testbed project <Apple/iOS/testbed>` that
+The CPython source tree contains :source:`a testbed project <Apple/testbed>` that
 is used to run the CPython test suite on the iOS simulator. This testbed can also
 be used as a testbed project for running your Python library's test suite on iOS.
 

@@ -1864,10 +1864,8 @@ and bundle it with the source of your extension.
 
 .. seealso::
 
-   https://hg.python.org/cpython/file/default/Objects/obmalloc.c
-      For the full details of the pymalloc implementation, see the comments at
-      the top of the file :file:`Objects/obmalloc.c` in the Python source code.
-      The above link points to the file within the python.org SVN browser.
+   For the full details of the pymalloc implementation, see the comments at
+   the top of the :source:`Objects/obmalloc.c` file in the Python source code.
 
 .. ======================================================================
 

@@ -173,8 +173,7 @@ Hosting of the Python bug tracker is kindly provided by
 `Upfront Systems <https://upfrontsoftware.co.za>`__
 of Stellenbosch, South Africa.  Martin von Löwis put a
 lot of effort into importing existing bugs and patches from
-SourceForge; his scripts for this import operation are at
-``https://svn.python.org/view/tracker/importer/`` and may be useful to
+SourceForge; his scripts for this import operation may be useful to
 other projects wishing to move from SourceForge to Roundup.
 
 .. seealso::
@@ -188,9 +187,6 @@ other projects wishing to move from SourceForge to Roundup.
   https://roundup.sourceforge.io/
     Roundup downloads and documentation.
 
-  https://svn.python.org/view/tracker/importer/
-    Martin von Löwis's conversion scripts.
-
 New Documentation Format: reStructuredText Using Sphinx
 -----------------------------------------------------------
 

@@ -2213,7 +2213,7 @@ for details.)
 The :c:member:`PyTypeObject.tp_finalize` slot is now part of the stable ABI.
 
 Windows builds now require Microsoft Visual C++ 14.0, which
-is available as part of `Visual Studio 2015 <https://visualstudio.microsoft.com/en/vs/older-downloads/#visual-studio-2015-and-other-products>`_.
+is available as part of `Visual Studio 2015 <https://visualstudio.microsoft.com/vs/older-downloads/#visual-studio-2015-update>`_.
 
 Extension modules now include a platform information tag in their filename on
 some platforms (the tag is optional, and CPython will import extensions without

@@ -593,10 +593,10 @@ class Counter(dict):
 
     '''
     # References:
-    #   http://en.wikipedia.org/wiki/Multiset
-    #   http://www.gnu.org/software/smalltalk/manual-base/html_node/Bag.html
-    #   http://www.java2s.com/Tutorial/Cpp/0380__set-multiset/Catalog0380__set-multiset.htm
-    #   http://code.activestate.com/recipes/259174/
+    #   https://en.wikipedia.org/wiki/Multiset
+    #   https://www.gnu.org/software/smalltalk/manual-base/html_node/Bag.html
+    #   https://web.archive.org/web/20210108001926/http://www.java2s.com/Tutorial/Cpp/0380__set-multiset/Catalog0380__set-multiset.htm
+    #   https://code.activestate.com/recipes/259174/
     #   Knuth, TAOCP Vol. II section 4.6.3
 
     def __init__(self, iterable=None, /, **kwds):