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Software License(Continue)
ENG 13-10
GNU GENERAL PUBLIC LICENSE
Version 3, 29 June 2007
© 2007 Free Software Foundation, Inc. <http://fsf.org/> Everyone is permitted to copy
distribute verbatim copies of this license document, but changing it is not allowed.
GNU General Public License is a free, copyleft license for software and other kinds of works.
licenses for most software and other practical works are designed to take away your freedom
share and change the works. By contrast, the GNU General Public License is intended to
your freedom to share and change all versions of a program--to make sure it remains
software for all its users. We, the Free Software Foundation, use the GNU General Public
for most of our software; it applies also to any other work released this way by its
You can apply it to your programs, too.
we speak of free software, we are referring to freedom, not price. Our General Public
are designed to make sure that you have the freedom to distribute copies of free
(and charge for them if you wish), that you receive source code or can get it if you want
that you can change the software or use pieces of it in new free programs, and that you know
protect your rights, we need to prevent others from denying you these rights or asking you to
the rights. Therefore, you have certain responsibilities if you distribute copies of the
or if you modify it: responsibilities to respect the freedom of others.
example, if you distribute copies of such a program, whether gratis or for a fee, you must
on to the recipients the same freedoms that you received. You must make sure that they,
receive or can get the source code. And you must show them these terms so they know their
that use the GNU GPL protect your rights with two steps: (1) assert copyright on the
and (2) offer you this License giving you legal permission to copy, distribute and/or
the developers' and authors' protection, the GPL clearly explains that there is no warranty for
free software. For both users' and authors' sake, the GPL requires that modified versions be
as changed, so that their problems will not be attributed erroneously to authors of
devices are designed to deny users access to install or run modified versions of the
inside them, although the manufacturer can do so. This is fundamentally incompatible
the aim of protecting users' freedom to change the software. The systematic pattern of such
occurs in the area of products for individuals to use, which is precisely where it is most
Therefore, we have designed this version of the GPL to prohibit the practice for
products. If such problems arise substantially in other domains, we stand ready to extend
provision to those domains in future versions of the GPL, as needed to protect the freedom of
every program is threatened constantly by software patents. States should not allow
to restrict development and use of software on general-purpose computers, but in those
do, we wish to avoid the special danger that patents applied to a free program could make it
proprietary. To prevent this, the GPL assures that patents cannot be used to render
precise terms and conditions for copying, distribution and modification follow.
TERMS AND CONDITIONS
0. Definitions.
"This
License" refers to version 3 of the GNU General Public License.
also means copyright-like laws that apply to other kinds of works, such as
also means copyright-like laws that apply to other kinds of works, such as
"modify" a work means to copy from or adapt all or part of the work in a fashion requiring
permission, other than the making of an exact copy. The resulting work is called a
version" of the earlier work or a work "based on" the earlier work.
"covered work" means either the unmodified Program or a work based on the Program.
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