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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

Library 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.