Users Guide

their problems will not be attributed erroneously to authors of previous versions. Some devices are designed to deny users
access to install or run modified versions of the software inside them, although the manufacturer can do so. This is
fundamentally incompatible with the aim of protecting users' freedom to change the software. The systematic pattern of such
abuse occurs in the area of products for individuals to use, which is precisely where it is most unacceptable. Therefore, we have
designed this version of the GPL to prohibit the practice for those products. If such problems arise substantially in other
domains, we stand ready to extend this provision to those domains in future versions of the GPL, as needed to protect the
freedom of users. Finally, every program is threatened constantly by software patents. States should not allow patents 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
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
output from running a covered work is covered by this License only if the output, given its content, constitutes a covered
work. This License acknowledges your rights of fair use or other equivalent, as provided by copyright law. You may make, run
and propagate covered works that you do not convey, without conditions so long as your license otherwise remains in force.
You may convey covered works to others for the sole purpose of having them make modifications exclusively for you, or
provide you with facilities for running those works, provided that you comply with the terms of this License in conveying all
material for which you do not control copyright. Those thus making or running the covered works for you must do so
exclusively on your behalf, under your direction and control, on terms that prohibit them from making any copies of your
copyrighted material outside their relationship with you. Conveying under any other circumstances is permitted solely under
the conditions stated below. Sublicensing is not allowed; section 10 makes it unnecessary.
3. Protecting Users' Legal Rights From Anti-Circumvention Law.
Third party licenses
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