Copyright 1988, 1989 Hans-J. Boehm, Alan J. Demers
-Copyright (c) 1991-1994 by Xerox Corporation. All rights reserved.
+Copyright (c) 1991-1995 by Xerox Corporation. All rights reserved.
+Copyright (c) 1996-1999 by Silicon Graphics. All rights reserved.
+Copyright (c) 1999 by Hewlett-Packard. All rights reserved.
THIS MATERIAL IS PROVIDED AS IS, WITH ABSOLUTELY NO WARRANTY EXPRESSED
OR IMPLIED. ANY USE IS AT YOUR OWN RISK.