Path: utzoo!utgpu!news-server.csri.toronto.edu!cs.utexas.edu!sdd.hp.com!zaphod.mps.ohio-state.edu!cis.ohio-state.edu!tut.cis.ohio-state.edu!sei.cmu.edu!fs7.ece.cmu.edu!o.gp.cs.cmu.edu!MRT.MACH.CS.CMU.EDU!mrt
From: mrt@MRT.MACH.CS.CMU.EDU (Mary Thompson)
Newsgroups: comp.os.mach
Subject: Mach 3.0 status
Message-ID: <1991May13.173127.12800@cs.cmu.edu>
Date: 13 May 91 17:31:27 GMT
Sender: netnews@cs.cmu.edu (USENET News Group Software)
Reply-To: mrt@MRT.MACH.CS.CMU.EDU (Mary Thompson)
Followup-To: Phil Howard
Organization: Carnegie Mellon University
Lines: 34

Of your two catagories I think Mach 3.0 falls (or will fall) in freeware source.
Each file contains the following copyright notice which I believe distinguishes
from public domain:

/*
 * Mach Operating System
 * Copyright (c) 1991 Carnegie Mellon University
 * All Rights Reserved.
 * 
 * Permission to use, copy, modify and distribute this software and its
 * documentation is hereby granted, provided that both the copyright
 * notice and this permission notice appear in all copies of the
 * software, derivative works or modified versions, and any portions
 * thereof, and that both notices appear in supporting documentation.
 *
 * CARNEGIE MELLON ALLOWS FREE USE OF THIS SOFTWARE IN ITS "AS IS"
 * CONDITION.  CARNEGIE MELLON DISCLAIMS ANY LIABILITY OF ANY KIND FOR
 * ANY DAMAGES WHATSOEVER RESULTING FROM THE USE OF THIS SOFTWARE.
 *
 * Carnegie Mellon requests users of this software to return to
 *
 *  Software Distribution Coordinator  or  Software.Distribution@CS.CMU.EDU
 *  School of Computer Science
 *  Carnegie Mellon University
 *  Pittsburgh PA 15213-3890
 *
 * any improvements or extensions that they make and grant Carnegie Mellon
 * the rights to redistribute these changes.
 */

We are hoping to get the same sort of permissions for contributed code

Mary Thompson
Project Mach Distribution Manager.