		calc - arbitrary precision calculator


This file is Copyrighted
------------------------

    This file is covered under the following Copyright:

	Copyright (C) 1999  Landon Curt Noll
	All rights reserved.

	Everyone is permitted to copy and distribute verbatim copies
	of this license document, but changing it is not allowed.

    # @(#) $Revision: 30.1 $
    # @(#) $Id: COPYING,v 30.1 2007/03/16 11:09:46 chongo Exp $
    # @(#) $Source: /usr/local/src/cmd/calc/RCS/COPYING,v $

=-=

Calc is covered by the GNU Lesser General Public License
--------------------------------------------------------

    Calc is open software; you can redistribute it and/or modify it under
    the terms of the GNU Lesser General Public License as published by
    the Free Software Foundation version 2.1 of the License.

    Calc is several binary link libraries, several modules, associated
    interface definition files and scripts used to control its compilation
    and installation.

    Calc is distributed in the hope that it will be useful, but WITHOUT
    ANY WARRANTY; without even the implied warranty of MERCHANTABILITY
    or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU Lesser General
    Public License for more details.

    A copy of the GNU Lesser General Public License is distributed with
    calc under the filename:

	    COPYING-LGPL

    You may display this file by the calc command:	help copying

    You may display the GNU Lesser General
    Public License by the calc command:			help copying-lgpl

    You should have received a copy of the version 2.1 GNU Lesser General
    Public License with calc; if not, write to the following address:

	    Free Software Foundation, Inc.
	    51 Franklin Street
	    Fifth Floor
	    Boston, MA  02110-1301
	    USA

    The contact addresses for calc is as follows:

	Web:	http://www.isthe.com/chongo/tech/comp/calc/email.html

    To join the low volume calc mailing list.  Send a EMail message to:

	calc-tester-request at asthe dot com

    Your subject must contain the words:

	calc mailing list subscription

    You may have additional words in your subject line.

    Your message body (not the subject) should consist of:

	 subscribe calc-tester address
	 end
	 name your_full_name

    where ``address'' is your EMail address and ``your_full_name'' is
    your full name.

    Feel free to follow the name line with additional EMail text as desired.

=-=

    Calc bug reports and calc bug fixes should be sent to:

	calc-bugs at asthe dot com

    [[ NOTE: Replace 'at' with @, 'dot' is with . and remove the spaces ]]
    [[ NOTE: The EMail address uses 'asthe' and the web site URL uses 'isthe' ]]

    Your subject must contain the words:

	   calc bug report

    You may have additional words in your subject line.

=-=

Calc's relationship to the GNU Lesser General Public License
------------------------------------------------------------

    In section 0 of the GNU Lesser General Public License, one finds
    the following definition:

	The "Library", below, refers to any such software library or
	work which has been distributed under these terms.

    Calc is distributed under the terms of the GNU Lesser
    General Public License.

    In the same section 0, one also find the following:

	For a library, complete source code means all the source code
	for all modules it contains, plus any associated interface
	definition files, plus the scripts used to control compilation
	and installation of the library.

    There are at least two calc binary link libraries found in calc:

	libcalc.a	libcustcalc.a

    Clearly all files that go into the creation of those binary link
    libraries are covered under the License.

    The ``scripts used to control compilation and installation of the
    of the library'' include:

	* Makefiles
	* source files created by the Makefiles
	* source code used in the creation of intermediate source files

     All of those files are covered under the License.

     The ``associated interface definition files'' are those files that:

	* show how the calc binary link libraries are used
	* test the validity of the binary link libraries
	* document routines found in the binary link libraries
	* show how one can interactively use the binary link libraries

     Calc provides an extensive set of files that perform the above
     functions.

	* files under the sample sub-directory
	* files under the help sub-directory
	* files under the lib sub-directory
	* the main calc.c file

     The ``complete source code'' includes ALL files shipped with calc,
     except for the exception files explicitly listed in the ``Calc
     copyrights and exception files'' section below.

=-=

Calc copyrights and exception files
-----------------------------------

    With the exception of the files listed below, Calc is covered under
    the following GNU Lesser General Public License Copyrights:

	Copyright (C) year  David I. Bell
	Copyright (C) year  David I. Bell and Landon Curt Noll
	Copyright (C) year  David I. Bell and Ernest Bowen
	Copyright (C) year  David I. Bell, Landon Curt Noll and Ernest Bowen
	Copyright (C) year  Landon Curt Noll
	Copyright (C) year  Ernest Bowen and Landon Curt Noll
	Copyright (C) year  Ernest Bowen
	Copyright (C) year  Petteri Kettunen and Landon Curt Noll

    These files are not covered under one of the Copyrights listed above:

	    shs1.c	    shs1.h	 shs.c		shs.h
	    md5.c	    md5.h	 COPYING	COPYING-LGPL
	    cal/qtime.cal   cal/screen.cal

    The file COPYING-LGPL, which contains a copy of the version 2.1
    GNU Lesser General Public License, is itself Copyrighted by the
    Free Software Foundation, Inc.  Please note that the Free Software
    Foundation, Inc. does NOT have a copyright over calc, only the
    COPYING-LGPL that is supplied with calc.

    This file, COPYING, is distributed under the Copyright found at the
    top of this file.  It is important to note that you may distribute
    verbatim copies of this file but you may not modify this file.

    Some of these exception files are in the public domain.  The md5.c
    and md5.h files were "derived from the RSA Data Security, Inc. MD5
    Message-Digest Algorithm" and are under a copyright that allows these
    two files to be freely used and distributed.  Other files are under
    the LGPL but have different authors that those listed above.

    In all cases one may use and distribute these exception files freely.
    And because one may freely distribute the LGPL covered files, the
    entire calc source may be freely used and distributed.

=-=

General Copyleft and License info
---------------------------------

    For general information on Copylefts, see:

	http://www.gnu.org/copyleft/

    For information on GNU Lesser General Public Licenses, see:

	http://www.gnu.org/copyleft/lesser.html
	http://www.gnu.org/copyleft/lesser.txt

=-=

Why calc did not use the GNU General Public License
---------------------------------------------------

    It has been suggested that one should consider using the GNU General
    Public License instead of the GNU Lesser General Public License:

	http://www.gnu.org/philosophy/why-not-lgpl.html

    As you can read in the above URL, there are times where a library
    cannot give free software any particular advantage.	 One of those
    times is when there is significantly similar versions available
    that are not covered under a Copyleft such as the GNU General Public
    License.

    The reason why calc was placed under the GNU Lesser General Public
    License is because for many years (1984 thru 1999), calc was offered
    without any form of Copyleft.  At the time calc was placed under
    the GNU Lesser General Public License, a number of systems and
    distributions distributed calc without a Copyleft.
