| 1 | GNU GENERAL PUBLIC LICENSE
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| 2 | Version 1, February 1989
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| 3 |
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| 4 | Copyright (C) 1989 Free Software Foundation, Inc.
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| 5 | 59 Temple Place, Suite 330, Boston, MA 02111-1307, USA
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| 6 | Everyone is permitted to copy and distribute verbatim copies
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| 7 | of this license document, but changing it is not allowed.
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| 8 |
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| 9 | Preamble
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| 10 |
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| 11 | The license agreements of most software companies try to keep users
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| 12 | at the mercy of those companies. By contrast, our General Public
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| 13 | License is intended to guarantee your freedom to share and change free
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| 14 | software--to make sure the software is free for all its users. The
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| 15 | General Public License applies to the Free Software Foundation's
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| 16 | software and to any other program whose authors commit to using it.
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| 17 | You can use it for your programs, too.
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| 18 |
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| 19 | When we speak of free software, we are referring to freedom, not
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| 20 | price. Specifically, the General Public License is designed to make
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| 21 | sure that you have the freedom to give away or sell copies of free
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| 22 | software, that you receive source code or can get it if you want it,
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| 23 | that you can change the software or use pieces of it in new free
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| 24 | programs; and that you know you can do these things.
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| 25 |
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| 26 | To protect your rights, we need to make restrictions that forbid
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| 27 | anyone to deny you these rights or to ask you to surrender the rights.
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| 28 | These restrictions translate to certain responsibilities for you if you
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| 29 | distribute copies of the software, or if you modify it.
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| 30 |
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| 31 | For example, if you distribute copies of a such a program, whether
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| 32 | gratis or for a fee, you must give the recipients all the rights that
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| 33 | you have. You must make sure that they, too, receive or can get the
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| 34 | source code. And you must tell them their rights.
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| 35 |
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| 36 | We protect your rights with two steps: (1) copyright the software, and
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| 37 | (2) offer you this license which gives you legal permission to copy,
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