User's Manual

138

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 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 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

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

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 modications and/or translated into another language.