-@node License, Invocation, Introduction, Top
+@node License
@chapter Your rights and obligations
@cindex license
+@cindex licence
@cindex your rights and obligations
@cindex rights, your
+@cindex copyright
@cindex obligations, your
-@cindex Free Software Foundation
-@cindex GNU General Public License
-@cindex General Public License
-@cindex GPL
-@cindex distribution
-@cindex redistribution
-Most of PSPP is distributed under the GNU General Public
-License. The General Public License says, in effect, that you may
-modify and distribute PSPP as you like, as long as you grant the
-same rights to others. It also states that you must provide source code
-when you distribute PSPP, or, if you obtained PSPP
-source code from an anonymous ftp site, give out the name of that site.
+PSPP is not in the public domain. It is copyrighted and there are
+restrictions on its distribution, but these restrictions are designed
+to permit everything that a good cooperating citizen would want to do.
+What is not allowed is to try to prevent others from further sharing
+any version of this program that they might get from you.
-The General Public License is given in full in the source distribution
-as file @file{COPYING}. In Debian GNU/Linux, this file is also
-available as file @file{/usr/share/common-licenses/GPL-2}.
+Specifically, we want to make sure that you have the right to give
+away copies of PSPP, that you receive source code or else can get it
+if you want it, that you can change these programs or use pieces of
+them in new free programs, and that you know you can do these things.
-To quote the GPL itself:
+To make sure that everyone has such rights, we have to forbid you to
+deprive anyone else of these rights. For example, if you distribute
+copies of PSPP, you must give the recipients all the rights that you
+have. You must make sure that they, too, receive or can get the
+source code. And you must tell them their rights.
-@quotation
-This program is free software; you can redistribute it and/or modify it
-under the terms of the GNU General Public License as published by the
-Free Software Foundation; either version 2 of the License, or (at your
-option) any later version.
+Also, for our own protection, we must make certain that everyone finds
+out that there is no warranty for PSPP. If these programs are
+modified by someone else and passed on, we want their recipients to
+know that what they have is not what we distributed, so that any
+problems introduced by others will not reflect on our reputation.
-This program 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
-General Public License for more details.
+Finally, any free program is threatened constantly by software
+patents. We wish to avoid the danger that redistributors of a free
+program will individually obtain patent licenses, in effect making the
+program proprietary. To prevent this, we have made it clear that any
+patent must be licensed for everyone's free use or not licensed at all.
-You should have received a copy of the GNU General Public License along
-with this program; if not, write to the Free Software Foundation, Inc.,
-59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
-@end quotation
-@setfilename ignored
+The precise conditions of the license for PSPP are found in the
+GNU General Public License. You should have received a copy of
+the GNU General Public License along with this program; if not, write
+to the Free Software Foundation, Inc., 51 Franklin Street, Fifth
+Floor, Boston, MA 02110-1301 USA. This manual specifically
+is covered by the GNU Free Documentation License (@pxref{GNU Free
+Documentation License}).
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