diff --git a/runtime/doc/usr_23.txt b/runtime/doc/usr_23.txt
index 73a0679..b124b34 100644
--- a/runtime/doc/usr_23.txt
+++ b/runtime/doc/usr_23.txt
@@ -29,8 +29,8 @@
    When computers came out, storage was expensive.  Some people decided that
 they did not need two characters for end-of-line.  The UNIX people decided
 they could use <Line Feed> only for end-of-line.  The Apple people
-standardized on <CR>.  The MS-DOS (and Microsoft Windows) folks decided to
-keep the old <CR><LF>.
+standardized on <CR>.  The Microsoft Windows folks decided to keep
+the old <CR><LF>.
    This means that if you try to move a file from one system to another, you
 have line-break problems.  The Vim editor automatically recognizes the
 different file formats and handles things properly behind your back.