Use \url{} to mark URLs.
diff --git a/Doc/ext.tex b/Doc/ext.tex
index 596dd92..22f7ebc 100644
--- a/Doc/ext.tex
+++ b/Doc/ext.tex
@@ -1239,7 +1239,7 @@
 
 Before you build Python, you first need to fetch and build the \code{dl}
 package written by Jack Jansen.  This is available by anonymous ftp
-from host \file{ftp.cwi.nl}, directory \file{pub/dynload}, file
+from \url{ftp://ftp.cwi.nl/pub/dynload}, file
 \file{dl-1.6.tar.Z}.  (The version number may change.)  Follow the
 instructions in the package's \file{README} file to build it.
 
@@ -1261,10 +1261,10 @@
 
 You need to fetch and build two packages.
 One is GNU DLD.  All development of this code has been done with DLD
-version 3.2.3, which is available by anonymous ftp from host
-\file{ftp.cwi.nl}, directory \file{pub/dynload}, file
+version 3.2.3, which is available by anonymous ftp from
+\url{ftp://ftp.cwi.nl/pub/dynload}, file
 \file{dld-3.2.3.tar.Z}.  (A more recent version of DLD is available
-via \file{http://www-swiss.ai.mit.edu/~jaffer/DLD.html} but this has
+via \url{http://www-swiss.ai.mit.edu/~jaffer/DLD.html} but this has
 not been tested.)
 The other package needed is an
 emulation of Jack Jansen's \code{dl} package that I wrote on top of
diff --git a/Doc/ext/ext.tex b/Doc/ext/ext.tex
index 596dd92..22f7ebc 100644
--- a/Doc/ext/ext.tex
+++ b/Doc/ext/ext.tex
@@ -1239,7 +1239,7 @@
 
 Before you build Python, you first need to fetch and build the \code{dl}
 package written by Jack Jansen.  This is available by anonymous ftp
-from host \file{ftp.cwi.nl}, directory \file{pub/dynload}, file
+from \url{ftp://ftp.cwi.nl/pub/dynload}, file
 \file{dl-1.6.tar.Z}.  (The version number may change.)  Follow the
 instructions in the package's \file{README} file to build it.
 
@@ -1261,10 +1261,10 @@
 
 You need to fetch and build two packages.
 One is GNU DLD.  All development of this code has been done with DLD
-version 3.2.3, which is available by anonymous ftp from host
-\file{ftp.cwi.nl}, directory \file{pub/dynload}, file
+version 3.2.3, which is available by anonymous ftp from
+\url{ftp://ftp.cwi.nl/pub/dynload}, file
 \file{dld-3.2.3.tar.Z}.  (A more recent version of DLD is available
-via \file{http://www-swiss.ai.mit.edu/~jaffer/DLD.html} but this has
+via \url{http://www-swiss.ai.mit.edu/~jaffer/DLD.html} but this has
 not been tested.)
 The other package needed is an
 emulation of Jack Jansen's \code{dl} package that I wrote on top of
diff --git a/Doc/tut.tex b/Doc/tut.tex
index 976d2d9..41e524f 100644
--- a/Doc/tut.tex
+++ b/Doc/tut.tex
@@ -31,7 +31,7 @@
 
 The Python interpreter and the extensive standard library are freely
 available in source or binary form for all major platforms from the
-Python web site, \file{http://www.python.org}, and can be freely
+Python web site, \url{http://www.python.org}, and can be freely
 distributed.  The same site also contains distributions of and
 pointers to many free third party Python modules, programs and tools,
 and additional documentation.
@@ -3280,12 +3280,12 @@
 lot more; skimming through the Library Reference will give you an idea
 of what's available.
 
-The major Python Web site is \code{http://www.python.org}; it contains
+The major Python Web site is \url{http://www.python.org}; it contains
 code, documentation, and pointers to Python-related pages around the
 Web.  \code{www.python.org} is mirrored in various places around the
 world, such as Europe, Japan, and Australia; a mirror may be faster
 than the main site, depending on your geographical location.  A more
-informal site is \code{http://starship.skyport.net}, which contains a
+informal site is \url{http://starship.skyport.net}, which contains a
 bunch of Python-related personal home pages; many people have
 downloadable software here.
 
@@ -3297,14 +3297,14 @@
 answering) questions, suggesting new features, and announcing new
 modules.  But before posting, be sure to check the list of Frequently
 Asked Questions (also called the FAQ), at
-\code{http://www.python.org/doc/FAQ.html}, or look for it in the
-\code{Misc/} directory of the Python source distribution.  The FAQ
+\url{http://www.python.org/doc/FAQ.html}, or look for it in the
+\file{Misc/} directory of the Python source distribution.  The FAQ
 answers many of the questions that come up again and again, and may
 already contain the solution for your problem.
 
 You can support the Python community by joining the Python Software
 Activity, which runs the python.org web, ftp and email servers, and
-organizes Python workshops.  See \code{http://www.python.org/psa/} for
+organizes Python workshops.  See \url{http://www.python.org/psa/} for
 information on how to join.
 
 
diff --git a/Doc/tut/tut.tex b/Doc/tut/tut.tex
index 976d2d9..41e524f 100644
--- a/Doc/tut/tut.tex
+++ b/Doc/tut/tut.tex
@@ -31,7 +31,7 @@
 
 The Python interpreter and the extensive standard library are freely
 available in source or binary form for all major platforms from the
-Python web site, \file{http://www.python.org}, and can be freely
+Python web site, \url{http://www.python.org}, and can be freely
 distributed.  The same site also contains distributions of and
 pointers to many free third party Python modules, programs and tools,
 and additional documentation.
@@ -3280,12 +3280,12 @@
 lot more; skimming through the Library Reference will give you an idea
 of what's available.
 
-The major Python Web site is \code{http://www.python.org}; it contains
+The major Python Web site is \url{http://www.python.org}; it contains
 code, documentation, and pointers to Python-related pages around the
 Web.  \code{www.python.org} is mirrored in various places around the
 world, such as Europe, Japan, and Australia; a mirror may be faster
 than the main site, depending on your geographical location.  A more
-informal site is \code{http://starship.skyport.net}, which contains a
+informal site is \url{http://starship.skyport.net}, which contains a
 bunch of Python-related personal home pages; many people have
 downloadable software here.
 
@@ -3297,14 +3297,14 @@
 answering) questions, suggesting new features, and announcing new
 modules.  But before posting, be sure to check the list of Frequently
 Asked Questions (also called the FAQ), at
-\code{http://www.python.org/doc/FAQ.html}, or look for it in the
-\code{Misc/} directory of the Python source distribution.  The FAQ
+\url{http://www.python.org/doc/FAQ.html}, or look for it in the
+\file{Misc/} directory of the Python source distribution.  The FAQ
 answers many of the questions that come up again and again, and may
 already contain the solution for your problem.
 
 You can support the Python community by joining the Python Software
 Activity, which runs the python.org web, ftp and email servers, and
-organizes Python workshops.  See \code{http://www.python.org/psa/} for
+organizes Python workshops.  See \url{http://www.python.org/psa/} for
 information on how to join.