Distinguish free from non-free OSes

2 files changed, 15 insertions, 0 deletions

diff --git a/doc/emacs/macos.texi b/doc/emacs/macos.texi
index e669eaa4cbd..00e52f26d5e 100644
--- a/doc/emacs/macos.texi
+++ b/doc/emacs/macos.texi
@@ -14,6 +14,14 @@ built either without window system support, with X11, or with the
 Cocoa interface; this section only applies to the Cocoa build.  This
 does not support versions before macOS 10.6.
 
+  GNUstep is free software; MacOS is not.  MacOS a non-free operating
+system; that means it denies its users the freedom that every computer
+user deserves.  That is an injustice.  For your freedom's sake, we
+urge you to switch to a free operating system.
+
+  We support GNU Emacs on proprietary operating systems because
+we hope this taste of freedom will inspire users to escape from them.
+
   For various historical and technical reasons, Emacs uses the term
 @samp{Nextstep} internally, instead of ``Cocoa'' or ``macOS''; for
 instance, most of the commands and variables described in this section
diff --git a/doc/emacs/msdos.texi b/doc/emacs/msdos.texi
index 90f0389a0e0..ceb203c1c77 100644
--- a/doc/emacs/msdos.texi
+++ b/doc/emacs/msdos.texi
@@ -19,6 +19,13 @@ manual (@pxref{MS-DOS,,, emacs-xtra, Specialized Emacs Features}).
 section (@pxref{MS-DOS}).
 @end ifnottex
 
+  MS-Windows is a non-free operating system; that means it denies its
+users the freedom that every computer user deserves.  That is an
+injustice.  For your freedom's sake, we urge you to switch to a free
+operating system.
+
+  We support GNU Emacs on these proprietary operating systems because
+we hope this taste of freedom will inspire users to escape from them.
 
   The behavior of Emacs on MS-Windows is reasonably similar to what is
 documented in the rest of the manual, including support for long file