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GNU GENERAL PUBLIC
LICENSE
Version 2, June 1991
Copyright (C) 1989, 1991 Free Software Foundation, Inc.,
51 Franklin Street, Fifth Floor, Boston, MA 02110-1301
USA
Everyone is permitted to copy and distribute verbatim
copies of this license document, but changing it is not
allowed.
Preamble
The licenses for most software are designed to take away
your freedom to share and change it. By contrast, the GNU
General Public License is intended to guarantee your
freedom to share and change free software--to make sure
the software is free for all its users. This General Public
License applies to most of the Free Software Foundation's
software and to any other program whose authors commit
to using it. (Some other Free Software Foundation
software is covered by the GNU Lesser General Public
License instead.) You can apply it to your programs, too.
When we speak of free software, we are referring to
freedom, not price. Our General Public Licenses are
designed to make sure that you have the freedom to
distribute copies of free software (and charge for this
service if you wish), that you receive source code or can
get it if you want it, that you can change the software or use
pieces of it in new free programs; and that you know you
can do these things.
To protect your rights, we need to make restrictions that
forbid anyone to deny you these rights or to ask you to
surrender the rights.
These restrictions translate to certain responsibilities for
you if you distribute copies of the software, or if you
modify it.
For example, if you distribute copies of such a program,
whether gratis or for a fee, 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 show
them these terms so they know their rights.
We protect your rights with two steps: (1) copyright the
software, and (2) offer you this license which gives you
legal permission to copy, distribute and/or modify the
software.
140
GNU GENERAL PUBLIC LICENSE
Also, for each author's protection and ours, we want to
make certain that everyone understands that there is no
warranty for this free software. If the software is modified
by someone else and passed on, we want its recipients to
know that what they have is not the original, so that any
problems introduced by others will not reflect on the
original authors' reputations.
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.
The precise terms and conditions for copying, distribution
and modification follow.
TERMS AND CONDITIONS FOR
COPYING, DISTRIBUTION AND
MODIFICATION
0.
This License applies to any program or other work
which contains a notice placed by the copyright
holder saying it may be distributed under the terms of
this General Public License. The "Program", below,
refers to any such program or work, and a "work
based on the Program" means either the Program or
any derivative work under copyright law: that is to
say, a work containing the Program or a portion of it,
either verbatim or with modifications and/or
translated into another language. (Hereinafter,
translation is included without limitation in the term
"modification".) Each licensee is addressed as "you".
Activities other than copying, distribution and
modification are not covered by this License; they are
outside its scope. The act of running the Program is not
restricted, and the output from the Program is covered only
if its contents constitute a work based on the Program
(independent of having been made by running the
Program).
Whether that is true depends on what the Program does.
1.
You may copy and distribute verbatim copies of the
Program's source code as you receive it, in any
medium, provided that you conspicuously and
appropriately publish on each copy an appropriate
copyright notice and disclaimer of warranty; keep
intact all the notices that refer to this License and to
the absence of any warranty; and give any other
recipients of the Program a copy of this License along
with the Program.
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