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
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