diff --git a/sj3serv/comuni.c b/sj3serv/comuni.c
index 90e9ff9..0eaac95 100644
--- a/sj3serv/comuni.c
+++ b/sj3serv/comuni.c
@@ -1,6 +1,8 @@
-/*
+/*-
+ * SPDX-License-Identifier: MIT-open-group
+ *
  * Copyright (c) 1991-1994  Sony Corporation
- * 
+ *
  * Permission is hereby granted, free of charge, to any person obtaining
  * a copy of this software and associated documentation files (the
  * "Software"), to deal in the Software without restriction, including
@@ -8,10 +10,10 @@
  * distribute, sublicense, and/or sell copies of the Software, and to
  * permit persons to whom the Software is furnished to do so, subject to
  * the following conditions:
- * 
+ *
  * The above copyright notice and this permission notice shall be
  * included in all copies or substantial portions of the Software.
- * 
+ *
  * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
  * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
  * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.
@@ -19,21 +21,13 @@
  * DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR
  * OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR
  * THE USE OR OTHER DEALINGS IN THE SOFTWARE.
- * 
+ *
  * Except as contained in this notice, the name of Sony Corporation
  * shall not be used in advertising or otherwise to promote the sale, use
  * or other dealings in this Software without prior written authorization
  * from Sony Corporation.
- *
  */
 
-/*
- * $SonyRCSfile: comuni.c,v $  
- * $SonyRevision: 1.4 $ 
- * $SonyDate: 1994/11/16 07:34:05 $
- *
- * $Id$
- */
 
 
 #include <stdlib.h>
diff --git a/sj3serv/error.c b/sj3serv/error.c
index 815bcdc..8d7c8cb 100644
--- a/sj3serv/error.c
+++ b/sj3serv/error.c
@@ -1,4 +1,6 @@
-/*
+/*-
+ * SPDX-License-Identifier: MIT-open-group
+ *
  * Copyright (c) 1991-1994  Sony Corporation
  * 
  * Permission is hereby granted, free of charge, to any person obtaining
@@ -24,16 +26,8 @@
  * shall not be used in advertising or otherwise to promote the sale, use
  * or other dealings in this Software without prior written authorization
  * from Sony Corporation.
- *
  */
 
-/*
- * $SonyRCSfile: error.c,v $  
- * $SonyRevision: 1.1 $ 
- * $SonyDate: 1994/06/03 08:02:51 $
- *
- * $Id$
- */
 
 
 
diff --git a/sj3serv/execute.c b/sj3serv/execute.c
index 81c51c7..1a4961e 100644
--- a/sj3serv/execute.c
+++ b/sj3serv/execute.c
@@ -1,4 +1,6 @@
-/*
+/*-
+ * SPDX-License-Identifier: MIT-open-group
+ * 
  * Copyright (c) 1991-1994  Sony Corporation
  * 
  * Permission is hereby granted, free of charge, to any person obtaining
@@ -24,16 +26,8 @@
  * shall not be used in advertising or otherwise to promote the sale, use
  * or other dealings in this Software without prior written authorization
  * from Sony Corporation.
- *
  */
 
-/*
- * $SonyRCSfile: execute.c,v $  
- * $SonyRevision: 1.7 $ 
- * $SonyDate: 1998/04/13 11:20:12 $
- *
- * $Id$
- */
 
 
 #include "sj_kcnv.h"
diff --git a/sj3serv/main.c b/sj3serv/main.c
index 59a4e72..e61e516 100644
--- a/sj3serv/main.c
+++ b/sj3serv/main.c
@@ -1,4 +1,6 @@
-/*
+/*-
+ * SPDX-License-Identifier: MIT-open-group
+ * 
  * Copyright (c) 1991-1994  Sony Corporation
  * 
  * Permission is hereby granted, free of charge, to any person obtaining
@@ -24,7 +26,6 @@
  * shall not be used in advertising or otherwise to promote the sale, use
  * or other dealings in this Software without prior written authorization
  * from Sony Corporation.
- *
  */
 
 #include "sj_sysvdef.h"
diff --git a/sj3serv/serverrc b/sj3serv/serverrc
index e086c6e..469b4c9 100644
--- a/sj3serv/serverrc
+++ b/sj3serv/serverrc
@@ -1,3 +1,4 @@
+## SPDX-License-Identifier: MIT-open-group
 ##
 ## Copyright (c) 1991-1994  Sony Corporation
 ## 
@@ -24,12 +25,5 @@
 ## shall not be used in advertising or otherwise to promote the sale, use
 ## or other dealings in this Software without prior written authorization
 ## from Sony Corporation.
-##
-
-##
-## $SonyRCSfile: serverrc,v $  
-## $SonyRevision: 1.1 $ 
-## $SonyDate: 1994/06/03 08:02:55 $
-##
 
 readdict	sj3main.dic
diff --git a/sj3serv/setup.c b/sj3serv/setup.c
index 49122d1..42bf166 100644
--- a/sj3serv/setup.c
+++ b/sj3serv/setup.c
@@ -1,4 +1,6 @@
-/*
+/*-
+ * SPDX-License-Identifier: MIT-open-group
+ * 
  * Copyright (c) 1991-1994  Sony Corporation
  * Copyright (c) 1996 Hidekazu Kuroki
  * 
@@ -25,16 +27,8 @@
  * shall not be used in advertising or otherwise to promote the sale, use
  * or other dealings in this Software without prior written authorization
  * from Sony Corporation.
- *
  */
 
-/*
- * $SonyRCSfile: setup.c,v $  
- * $SonyRevision: 1.3 $ 
- * $SonyDate: 1994/12/09 11:27:07 $
- *
- * $Id$
- */
 
 
 
diff --git a/sj3serv/time_stamp.c b/sj3serv/time_stamp.c
index b46bbbf..07b2269 100644
--- a/sj3serv/time_stamp.c
+++ b/sj3serv/time_stamp.c
@@ -1,4 +1,6 @@
-/*
+/*-
+ * SPDX-License-Identifier: MIT-open-group
+ * 
  * Copyright (c) 1991-1994  Sony Corporation
  * 
  * Permission is hereby granted, free of charge, to any person obtaining
@@ -24,14 +26,8 @@
  * shall not be used in advertising or otherwise to promote the sale, use
  * or other dealings in this Software without prior written authorization
  * from Sony Corporation.
- *
  */
 
-/*
- * $SonyRCSfile: time_stamp.c,v $  
- * $SonyRevision: 1.6 $ 
- * $SonyDate: 1998/04/08 13:11:10 $
- */
 
 
 
diff --git a/sj3serv/version.c b/sj3serv/version.c
index 402d14a..c6556f7 100644
--- a/sj3serv/version.c
+++ b/sj3serv/version.c
@@ -1,4 +1,6 @@
-/*
+/*-
+ * SPDX-License-Identifier: MIT-open-group
+ * 
  * Copyright (c) 1991-1994  Sony Corporation
  * 
  * Permission is hereby granted, free of charge, to any person obtaining
@@ -24,14 +26,8 @@
  * shall not be used in advertising or otherwise to promote the sale, use
  * or other dealings in this Software without prior written authorization
  * from Sony Corporation.
- *
  */
 
-/*
- * $SonyRCSfile: version.c,v $  
- * $SonyRevision: 1.9 $ 
- * $SonyDate: 1998/04/08 13:11:10 $
- */