Five is distributed under the provisions of the Zope Public License
(ZPL) v2.1.  See doc/ZopePublicLicense.txt for the license text.

Copyright (C) 2005 Five Contributors. See CREDITS.txt for a list of
Five contributors.

Five contains source code derived from:

- Zope 3, copyright (C) 2001-2005 by Zope Corporation.  Code that
  falls under this copyright is prefixed with the following header:

  Copyright (c) 2001-2004 Zope Corporation and Contributors.
  All Rights Reserved.

  This software is subject to the provisions of the Zope Public
  License, Version 2.1 (ZPL).  A copy of the ZPL should accompany this
  distribution.  THIS SOFTWARE IS PROVIDED "AS IS" AND ANY AND ALL
  EXPRESS OR IMPLIED WARRANTIES ARE DISCLAIMED, INCLUDING, BUT NOT
  LIMITED TO, THE IMPLIED WARRANTIES OF TITLE, MERCHANTABILITY,
  AGAINST INFRINGEMENT, AND FITNESS FOR A PARTICULAR PURPOSE.

- metaclass.py is derived from PEAK, copyright (C) 1996-2004 by
  Phillip J. Eby and Tyler C. Sarna. PEAK may be used under the same
  terms as Zope.

- TrustedExecutables. Dieter Mauer kindly allow licensing this under the
  ZPL 2.1.