Owner’s Manual

GNU GENERAL PUBLIC LICENSE
Version 2, June 1991
Copyright (C) 1989, 1991 Free Software
Foundation, Inc.
51 Franklin Street, Fifth Floor, Boston, MA 02110-
1301, USA
Everyone is permitted to copy and distribute
verbatim copies of this license document, but
changing it is not allowed.
Preamble
The licenses for most software are designed to
take away your freedom to share and change it.
By contrast, the GNU General Public License is
intended to guarantee your freedom to share and
change free software--to make sure the software
is free for all its users. This General Public License
applies to most of the Free Software Foundation’s
software and to any other program whose authors
commit to using it. (Some other Free Software
Foundation software is covered by the GNU
Lesser General Public License instead.) You can
apply it to your programs, too.
When we speak of free software, we are referring
to freedom, not price. Our General Public Licenses
are designed to make sure that you have the
freedom to distribute copies of free software
(and charge for this service if you wish), that you
receive source code or can get it if you want it,
that you can change the software or use pieces
of it in new free programs; and that you know you
can do these things.
To protect your rights, we need to make
restrictions that forbid anyone to deny you these
rights or to ask you to surrender the rights. These
restrictions translate to certain responsibilities for
you if you distribute copies of the software, or if
you modify it.
For example, if you distribute copies of such a
program, whether gratis or for a fee, you must
give the recipients all the rights that you have. You
must make sure that they, too, receive or can get
the source code. And you must show them these
terms so they know their rights.
We protect your rights with two steps: (1)
copyright the software, and (2) offer you this
license which gives you legal permission to copy,
distribute and/or modify the software.
Also, for each author’s protection and ours, we
want to make certain that everyone understands
that there is no warranty for this free software.
If the software is modified by someone else and
passed on, we want its recipients to know that
what they have is not the original, so that any
problems introduced by others will not reflect on
the original authors’ reputations.
Finally, any free program is threatened constantly
by software patents. We wish to avoid the
danger that redistributors of a free program will
individually obtain patent licenses, in effect making
the program proprietary. To prevent this, we have
made it clear that any patent must be licensed for
everyone’s free use or not licensed at all.
The precise terms and conditions for copying,
distribution and modification follow.
TERMS AND CONDITIONS FOR COPYING,
DISTRIBUTION AND MODIFICATION
0. This License applies to any program or other
work which contains a notice placed by the
copyright holder saying it may be distributed
under the terms of this General Public License.
The “Program”, below, refers to any such
program or work, and a “work based on the
Program” means either the Program or any
derivative work under copyright law: that is to
say, a work containing the Program or a portion
of it, either verbatim or with modifications and/
or translated into another language. (Hereinafter,
translation is included without limitation in
the term “modification”.) Each licensee is
addressed as “you”.
Activities other than copying, distribution and
modification are not covered by this License;
they are outside its scope. The act of running
the Program is not restricted, and the output
from the Program is covered only if its contents
constitute a work based on the Program
(independent of having been made by running
the Program). Whether that is true depends on
what the Program does.
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OPEN SOURCE LICENSE