ISC licence

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ISC licence
Author	Internet Systems Consortium
OSI approved	Yes

The ISC licence is a permissive free software licence written by the Internet Systems Consortium (ISC). It is functionally equivalent to the 2-clause BSD licence, with language "made unnecessary by the Berne convention" removed.^[1] Initially used for the ISC's own software releases, it has since become the preferred licence of OpenBSD, among other projects.^[2]

Before accepting the licence as a free software licence, the Free Software Foundation (FSF) asked for clarification of the text. As a result, in July 2007 the first instance of the word and in the first sentence was changed to and/or.^[3]

A template of this licence is:

Copyright (c) Year(s), Company or Person's Name <E-mail address>

Permission to use, copy, modify, and/or distribute this software for any
purpose with or without fee is hereby granted, provided that the above
copyright notice and this permission notice appear in all copies.

THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.