Sony BDP-S280 User Manual

Page 39

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Preamble
The GNU General Public License is a free, copyleft

license for software and other kinds of works.

The licenses for most software and other practical

works are designed to take away your freedom to share

and change the works. By contrast, the GNU General

Public License is intended to guarantee your freedom to

share and change all versions of a program--to make

sure it remains free software for all its users. We, the
Free Software Foundation, use the GNU General

Public License for most of our software; it applies also

to any other work released this way by its authors. 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 them
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 prevent others from

denying you these rights or asking you to surrender the

rights. Therefore, you have certain responsibilities if
you distribute copies of the software, or if you modify

it: responsibilities to respect the freedom of others.

For example, if you distribute copies of such a
program, whether gratis or for a fee, you must pass on

to the recipients the same freedoms that you received.
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.
Developers that use the GNU GPL protect your rights

with two steps: (1) assert copyright on the software, and

(2) offer you this License giving you legal permission

to copy, distribute and/or modify it.

For the developers' and authors' protection, the GPL

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requires that modified versions be marked as changed,

so that their problems will not be attributed erroneously

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Some devices are designed to deny users access to

install or run modified versions of the software inside

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