--- a/runtime/doc/tags
+++ b/runtime/doc/tags
@@ -4293,14 +4293,11 @@ OS/2	os_os2.txt	/*OS\/2*
 OS2	os_os2.txt	/*OS2*
 OS390	os_390.txt	/*OS390*
 OS390-Motif	os_390.txt	/*OS390-Motif*
+OS390-PuTTY	os_390.txt	/*OS390-PuTTY*
 OS390-bugs	os_390.txt	/*OS390-bugs*
-OS390-building	os_390.txt	/*OS390-building*
-OS390-changes	os_390.txt	/*OS390-changes*
-OS390-feedback	os_390.txt	/*OS390-feedback*
 OS390-has-ebcdic	os_390.txt	/*OS390-has-ebcdic*
+OS390-limitations	os_390.txt	/*OS390-limitations*
 OS390-open-source	os_390.txt	/*OS390-open-source*
-OS390-weaknesses	os_390.txt	/*OS390-weaknesses*
-OS390-xterm	os_390.txt	/*OS390-xterm*
 OffTheSpot	mbyte.txt	/*OffTheSpot*
 OnTheSpot	mbyte.txt	/*OnTheSpot*
 Operator-pending	intro.txt	/*Operator-pending*
@@ -4890,6 +4887,7 @@ chill.vim	syntax.txt	/*chill.vim*
 cindent()	eval.txt	/*cindent()*
 cinkeys-format	indent.txt	/*cinkeys-format*
 cinoptions-values	indent.txt	/*cinoptions-values*
+clear-undo	undo.txt	/*clear-undo*
 clearmatches()	eval.txt	/*clearmatches()*
 client-server	remote.txt	/*client-server*
 clientserver	remote.txt	/*clientserver*
@@ -5984,6 +5982,7 @@ help-translated	helphelp.txt	/*help-tran
 help-writing	helphelp.txt	/*help-writing*
 help-xterm-window	helphelp.txt	/*help-xterm-window*
 help.txt	help.txt	/*help.txt*
+helpfile_name.txt	helphelp.txt	/*helpfile_name.txt*
 helphelp	helphelp.txt	/*helphelp*
 helphelp.txt	helphelp.txt	/*helphelp.txt*
 hex-editing	tips.txt	/*hex-editing*
@@ -8356,13 +8355,10 @@ zO	fold.txt	/*zO*
 zOS	os_390.txt	/*zOS*
 zOS-Bugs	os_390.txt	/*zOS-Bugs*
 zOS-Motif	os_390.txt	/*zOS-Motif*
-zOS-building	os_390.txt	/*zOS-building*
-zOS-changes	os_390.txt	/*zOS-changes*
-zOS-feedback	os_390.txt	/*zOS-feedback*
+zOS-PuTTY	os_390.txt	/*zOS-PuTTY*
 zOS-has-ebcdic	os_390.txt	/*zOS-has-ebcdic*
+zOS-limitations	os_390.txt	/*zOS-limitations*
 zOS-open-source	os_390.txt	/*zOS-open-source*
-zOS-weaknesses	os_390.txt	/*zOS-weaknesses*
-zOS-xterm	os_390.txt	/*zOS-xterm*
 zR	fold.txt	/*zR*
 zW	spell.txt	/*zW*
 zX	fold.txt	/*zX*