* Marc Balmer wrote:
Quite some files of BSD operating systems contain
* Copyright (c) 1988 University of Utah.
* Copyright (c) 1982, 1990, 1993
* The Regents of the University of California. All rights reserved.
actually indent(1), a program to indent and format C program source
bears a copyright from 1976:
* Copyright (c) 1976 Board of Trustees of the University of Illinois.
32 years. And still useful. And this is the oldest copyright I could
find in an operating system (OpenBSD) that still ships today.
(usr.bin/indent in OpenBSD, for those who care)