diff --git a/DOC.Sanitize b/DOC.Sanitize
index ce687d6ffd..d14c8be9d7 100644
--- a/DOC.Sanitize
+++ b/DOC.Sanitize
@@ -30,12 +30,12 @@ fragment.  It will be sourced by the Sanitize shell script after
 verifying that the .Sanitize file looks reasonable but before taking
 any other action.  The arguments to Sanitize are passed to this
 fragment so that you can take conditional action.  For an example of
-it's use, see devo/gcc/config/.Sanitize.
+its use, see devo/gcc/config/.Sanitize.
 
 If the "Do-first:" section sets the local shell variable
 "keep_these_too", the files and/or directories listed there will be
 kept in addition to any files listed in "Things-to-keep:".  For an
-example of it's use, see devo/gcc/config/.Sanitize.
+example of its use, see devo/gcc/config/.Sanitize.
 
 The "Do-last:" section of .Sanitize should be a shell script fragment.
 It will be sourced by Sanitize after all other action is taken for
@@ -55,9 +55,15 @@ keep-cvs	avoids removing CVS.adm directories.  This option is
 		actually recognized and handled by the Sanitize shell
 		script.
 
+keep-cygnus	avoids removing Cygnus-only bits.
 keep-v9  	avoids removing the v9 stuff.
 keep-life	avoids removing the life stuff.
 keep-cri	avoids removing the cray research inc changes to emacs.
+keep-chill	avoids removing CHILL support.
+keep-mpw	avoids removing MPW host support.
+keep-gm		avoids removing GM-specific stuff.
+keep-powerpc-netware	avoids removing PPC NetWare stuff.
+
 for-intel	builds a distribution in the style that Intel likes.
 for-fsf		builds a distribution in the style that the FSF likes.