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<title>The Free Software Definition - GNU Project - Free Software Foundation (FSF)</title> |
<title>The Free Software Definition - GNU Project - Free Software Foundation (FSF)</title> |
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<link rel="stylesheet" type="text/css" href="/gnu.css" /> |
<link rel="stylesheet" type="text/css" href="/gnu.css" /> |
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<link rev="made" href="webmasters@gnu.org" /> |
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other people the central freedoms. This rule does not conflict with |
other people the central freedoms. This rule does not conflict with |
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the central freedoms; rather it protects them.</p> |
the central freedoms; rather it protects them.</p> |
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<p> |
<p> |
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Thus, you may have paid money to get copies of free software, or you |
You may have paid money to get copies of free software, or you |
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may have obtained copies at no charge. But regardless of how you got |
may have obtained copies at no charge. But regardless of how you got |
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your copies, you always have the freedom to copy and change the |
your copies, you always have the freedom to copy and change the |
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software, even to <a href="/philosophy/selling.html">sell copies</a>.</p> |
software, even to <a href="/philosophy/selling.html">sell copies</a>.</p> |
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no longer unusual; such free commercial software is very important.</p> |
no longer unusual; such free commercial software is very important.</p> |
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<p> |
<p> |
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Rules about how to package a modified version are acceptable, if they |
Rules about how to package a modified version are acceptable, if they |
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don't effectively block your freedom to release modified versions. |
don't substantively block your freedom to release modified versions. |
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Rules that ``if you make the program available in this way, you must |
Rules that ``if you make the program available in this way, you must |
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make it available in that way also'' can be acceptable too, on the |
make it available in that way also'' can be acceptable too, on the |
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same condition. (Note that such a rule still leaves you the choice of |
same condition. (Note that such a rule still leaves you the choice of |
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whether to publish the program or not.) It is also acceptable for the |
whether to publish the program or not.) It is also acceptable for the |
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license to require that, if you have distributed a modified version |
license to require that, if you have distributed a modified version |
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and a previous developer asks for a copy of it, you must send one.</p> |
and a previous developer asks for a copy of it, you must send one, |
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or that you identify yourself on your modifications.</p> |
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<p> |
<p> |
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In the GNU project, we use <a href="/copyleft/copyleft.html">``copyleft''</a> |
In the GNU project, we use <a href="/copyleft/copyleft.html">``copyleft''</a> |
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to protect these freedoms legally for everyone. But |
to protect these freedoms legally for everyone. But |
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certain licenses do or don't qualify.</p> |
certain licenses do or don't qualify.</p> |
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<p> |
<p> |
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If you are interested in whether a specific license qualifies as a |
If you are interested in whether a specific license qualifies as a |
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free software license, see our <a href="/licenses/license-list.html">list |
free software license, see our <a |
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of licenses</a>. If the |
href="/licenses/license-list.html">list of licenses</a>. If the |
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license you are concerned with is not listed there, you can ask us |
license you are concerned with is not listed there, you can ask us |
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about it by sending us email |
about it by sending us email at <a |
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at <a href="mailto:licensing@gnu.org"><licensing@gnu.org></a>.</p> |
href="mailto:licensing@gnu.org"><licensing@gnu.org></a>.</p> <p> |
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If you are contemplating writing a new license, please contact the FSF |
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by writing to that address. The proliferation of different free |
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software licenses means increased work for users in understanding the |
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licenses; we may be able to help you find an existing Free Software |
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license that meets your needs. |
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</p> |
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<p> |
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If that isn't possible, if you really need a new license, with our |
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help you can ensure that the license really is a Free Software license |
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and avoid various practical problems. |
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</p> |
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<hr /> |
<hr /> |
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<p> |
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something close (but not identical) to "free software". We prefer the |
something close (but not identical) to "free software". We prefer the |
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term "free software" because, once you have heard it refers to freedom |
term "free software" because, once you have heard it refers to freedom |
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rather than price, <a href="free-software-for-freedom.html">it calls |
rather than price, <a href="free-software-for-freedom.html">it calls |
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to mind freedom</a>.</p> |
to mind freedom</a>. The word "open" never does that.</p> |
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<hr /> |
<hr /> |
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<h4><a href="/philosophy/philosophy.html">Other Texts to Read</a></h4> |
<h4><a href="/philosophy/philosophy.html">Other Texts to Read</a></h4> |
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<!-- http://www.w3.org/WAI/ER/IG/ert/iso639.htm --> |
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[ |
[ |
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<a href="/philosophy/free-sw.cs.html">Česky</a> <!-- Czech --> |
<!-- Chinese (Simplified) --> |
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<a href="/philosophy/free-sw.cn.html">简体中文</a> |
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<!-- Chinese (Traditional) --> |
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| <a href="/philosophy/free-sw.zh.html">繁體中文</a> |
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| <a href="/philosophy/free-sw.cs.html">Česky</a> <!-- Czech --> |
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| <a href="/philosophy/free-sw.da.html">Dansk</a> <!-- Danish --> |
| <a href="/philosophy/free-sw.da.html">Dansk</a> <!-- Danish --> |
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| <a href="/philosophy/free-sw.de.html">Deutsch</a> <!-- German --> |
| <a href="/philosophy/free-sw.de.html">Deutsch</a> <!-- German --> |
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| <a href="/philosophy/free-sw.html">English</a> |
| <a href="/philosophy/free-sw.html">English</a> |
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| <a href="/philosophy/free-sw.es.html">Español</a> <!-- Spanish --> |
| <a href="/philosophy/free-sw.es.html">Español</a> <!-- Spanish --> |
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| <a href="/philosophy/free-sw.fr.html">Français</a> <!-- French --> |
| <a href="/philosophy/free-sw.fr.html">Français</a> <!-- French --> |
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| <a href="/philosophy/free-sw.gl.html">Galego</a> <!-- Galician --> |
| <a href="/philosophy/free-sw.gl.html">Galego</a> <!-- Galician --> |
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|
| <a href="/philosophy/free-sw.he.html">עברית</a> <!-- Hebrew --> |
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| <a href="/philosophy/free-sw.hr.html">Hrvatski</a> <!-- Croatian --> |
| <a href="/philosophy/free-sw.hr.html">Hrvatski</a> <!-- Croatian --> |
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| <a href="/philosophy/free-sw.id.html">Bahasa Indonesia</a> <!-- Indonesian --> |
| <a href="/philosophy/free-sw.id.html">Bahasa Indonesia</a> <!-- Indonesian --> |
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| <a href="/philosophy/free-sw.it.html">Italiano</a> <!-- Italian --> |
| <a href="/philosophy/free-sw.it.html">Italiano</a> <!-- Italian --> |
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| <a href="/philosophy/free-sw.pt.html">Português</a> <!-- Portuguese --> |
| <a href="/philosophy/free-sw.pt.html">Português</a> <!-- Portuguese --> |
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| <a href="/philosophy/free-sw.ro.html">Românã</a> <!-- Romanian --> |
| <a href="/philosophy/free-sw.ro.html">Românã</a> <!-- Romanian --> |
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| <a href="/philosophy/free-sw.ru.html">Русский</a> <!-- Russian --> |
| <a href="/philosophy/free-sw.ru.html">Русский</a> <!-- Russian --> |
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| <a href="/philosophy/free-sw.sl.html">Slovensko</a> <!--- Slovenian --> |
| <a href="/philosophy/free-sw.sl.html">Slovinsko</a> <!--- Slovenian --> |
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| <a href="/philosophy/free-sw.tr.html">Türkçe</a> <!-- Turkish --> |
| <a href="/philosophy/free-sw.tr.html">Türkçe</a> <!-- Turkish --> |
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] |
] |
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</p> |
</p> |
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</p> |
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<p> |
<p> |
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Copyright (C) 1996, 1997, 1998, 1999, 2000, 2001, 2002, 2003, Free |
Copyright (C) 1996, 1997, 1998, 1999, 2000, 2001, 2002, 2003, 2004 Free |
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Software Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA |
Software Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA |
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02111, USA |
02111, USA |
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