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to restrict development and use of software on
general-purpose computers, but in those that do,
we wish to avoid the special danger that patents
applied to a free program could make it effectively
proprietary. To prevent this, the GPL assures that
patents cannot be used to render the program
non-free.
The 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.
"Copyright" also means copyright-like laws
that apply to other kinds of works, such as
semiconductor masks.
"The Program" refers to any copyrightable work
licensed under this License. Each licensee is
addressed as "you". "Licensees" and "recipients"
may be individuals or organizations.
To "modify" a work means to copy from or adapt
all or part of the work in a fashion requiring
copyright permission, other than the making of an
exact copy. The resulting work is called a "modified
version" of the earlier work or a work "based on"
the earlier work.
A "covered work" means either the unmodified
Program or a work based on the Program.
To "propagate" a work means to do anything
with it that, without permission, would make you
directly or secondarily liable for infringement under
applicable copyright law, except executing it on a
computer or modifying a private copy. Propagation
includes copying, distribution (with or without
modification), making available to the public, and in
some countries other activities as well.
To "convey" a work means any kind of propagation
that enables other parties to make or receive
copies. Mere interaction with a user through a
computer network, with no transfer of a copy, is
not conveying.
An interactive user interface displays "Appropriate
Legal Notices" to the extent that it includes a
convenient and prominently visible feature that (1)
displays an appropriate copyright notice, and (2)
tells the user that there is no warranty for the work
(except to the extent that warranties are provided),
that licensees may convey the work under this
License, and how to view a copy of this License. If
the interface presents a list of user commands or
options, such as a menu, a prominent item in the
list meets this criterion.
1. Source code.
The "source code" for a work means the preferred
form of the work for making modifications to it.
"Object code" means any non-source form of a
work.
A "Standard Interface" means an interface
that either is an official standard defined by a
recognized standards body, or, in the case of
interfaces specified for a particular programming
language, one that is widely used among
developers working in that language.
The "System Libraries" of an executable work
include anything, other than the work as a whole,
that (a) is included in the normal form of packaging
a Major Component, but which is not part of that
Major Component, and (b) serves only to enable
use of the work with that Major Component,
or to implement a Standard Interface for which
an implementation is available to the public in
source code form. A "Major Component", in this
context, means a major essential component
(kernel, window system, and so on) of the specific
operating system (if any) on which the executable
work runs, or a compiler used to produce the
work, or an object code interpreter used to run it.
The "Corresponding Source" for a work in object
code form means all the source code needed to
generate, install, and (for an executable work) run
the object code and to modify the work, including
scripts to control those activities. However, it
does not include the work's System Libraries, or
general-purpose tools or generally available free
programs which are used unmodified in performing
those activities but which are not part of the work.
For example, Corresponding Source includes
interface definition files associated with source
files for the work, and the source code for shared
libraries and dynamically linked subprograms that
the work is specifically designed to require, such
as by intimate data communication or control flow
between those subprograms and other parts of
the work.
The Corresponding Source need not include
anything that users can regenerate automatically
from other parts of the Corresponding Source.
The Corresponding Source for a work in source
code form is that same work.
2. basic permissions.
All rights granted under this License are granted
for the term of copyright on the Program, and are
irrevocable provided the stated conditions are
met. This License explicitly affirms your unlimited
permission to run the unmodified Program. The
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