diff --git a/usr.bin/csplit/csplit.1 b/usr.bin/csplit/csplit.1
index 84ca52c330c5..1a0a22e215f4 100644
--- a/usr.bin/csplit/csplit.1
+++ b/usr.bin/csplit/csplit.1
@@ -144,6 +144,10 @@ Split standard input after the first 99 lines and every 100 lines thereafter:
 .Xr sed 1 ,
 .Xr split 1 ,
 .Xr re_format 7
+.Sh HISTORY
+A
+.Nm
+command appeared in PWB UNIX.
 .Sh STANDARDS
 The
 .Nm
diff --git a/usr.bin/head/head.1 b/usr.bin/head/head.1
index 9d233d356fd9..262ad20cd193 100644
--- a/usr.bin/head/head.1
+++ b/usr.bin/head/head.1
@@ -66,5 +66,4 @@ is the name of the file.
 .Sh HISTORY
 The
 .Nm
-command appeared in
-.Bx 3.0 .
+command appeared in PWB UNIX.
diff --git a/usr.bin/m4/m4.1 b/usr.bin/m4/m4.1
index dc734d3bb904..3307b873defc 100644
--- a/usr.bin/m4/m4.1
+++ b/usr.bin/m4/m4.1
@@ -404,8 +404,7 @@ conforms to
 .Sh HISTORY
 An
 .Nm
-command appeared in
-.At v7 .
+command appeared in PWB UNIX.
 .Sh AUTHORS
 .An -nosplit
 .An Ozan Yigit Aq oz@sis.yorku.ca
diff --git a/usr.bin/tabs/tabs.1 b/usr.bin/tabs/tabs.1
index 04baf095b2af..9874bca3ec6e 100644
--- a/usr.bin/tabs/tabs.1
+++ b/usr.bin/tabs/tabs.1
@@ -151,8 +151,7 @@ utility conforms to
 .Sh HISTORY
 A
 .Nm
-utility appeared in
-.At v7 .
+utility appeared in PWB UNIX.
 This implementation was introduced in
 .Fx 5.0 .
 .Sh BUGS
diff --git a/usr.bin/tail/tail.1 b/usr.bin/tail/tail.1
index 0439ca4981f6..482f42075919 100644
--- a/usr.bin/tail/tail.1
+++ b/usr.bin/tail/tail.1
@@ -180,5 +180,4 @@ option and display the last 4 lines of the input.
 .Sh HISTORY
 A
 .Nm
-command appeared in
-.At v7 .
+command appeared in PWB UNIX.
diff --git a/usr.bin/uname/uname.1 b/usr.bin/uname/uname.1
index f1a2c2132b3a..82ba0d449eb7 100644
--- a/usr.bin/uname/uname.1
+++ b/usr.bin/uname/uname.1
@@ -86,8 +86,7 @@ output is written on a single line, separated by spaces.
 .Sh HISTORY
 The
 .Nm
-command appeared in
-.At v7 .
+command appeared in PWB UNIX.
 .Sh STANDARDS
 The
 .Nm
diff --git a/usr.bin/uniq/uniq.1 b/usr.bin/uniq/uniq.1
index e19bed6728ac..7cf119286ca0 100644
--- a/usr.bin/uniq/uniq.1
+++ b/usr.bin/uniq/uniq.1
@@ -135,6 +135,10 @@ and
 options have been deprecated but are still supported in this implementation.
 .Sh SEE ALSO
 .Xr sort 1
+.Sh HISTORY
+A
+.Nm
+command appeared in PWB UNIX.
 .Sh STANDARDS
 The
 .Nm
diff --git a/usr.bin/wall/wall.1 b/usr.bin/wall/wall.1
index 7759f768b351..a170aba113fd 100644
--- a/usr.bin/wall/wall.1
+++ b/usr.bin/wall/wall.1
@@ -68,5 +68,4 @@ receive the message.
 .Sh HISTORY
 A
 .Nm
-command appeared in
-.At v7 .
+command appeared in PWB UNIX.
diff --git a/usr.bin/xargs/xargs.1 b/usr.bin/xargs/xargs.1
index e8856527f3a7..6c6e1d4c4702 100644
--- a/usr.bin/xargs/xargs.1
+++ b/usr.bin/xargs/xargs.1
@@ -279,6 +279,10 @@ and
 options are non-standard
 .Fx
 extensions which may not be available on other operating systems.
+.Sh HISTORY
+The
+.Nm
+command appeared in PWB UNIX.
 .Sh BUGS
 If
 .Ar utility
diff --git a/usr.bin/yacc/yacc.1 b/usr.bin/yacc/yacc.1
index 1db0a34550d2..00b50caa75a8 100644
--- a/usr.bin/yacc/yacc.1
+++ b/usr.bin/yacc/yacc.1
@@ -157,6 +157,10 @@ conflicts,
 the number of conflicts is reported on standard error.
 .Sh SEE ALSO
 .Xr yyfix 1
+.Sh HISTORY
+A
+.Nm
+command appeared in PWB UNIX.
 .Sh STANDARDS
 The
 .Nm