User's Manual

129
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) oer 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 modied 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 reect 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 eect 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
modication follow.
Terms & conditions for copying, distribution, & modication
0. This License applies to any program or other work which
contains a notice placed by the copyright holder saying it may